Lenovo a668t full specifications

Home
Brands
LENOVO
LENOVO A668T

WVGA, 800 x 480 pixels

5 MP

2592 x 1944 pixels

512 MB RAM

Android

2.3 Gingerbread

1500 mAh

Li-Ion

122 x 64 x 11.2 mm

125 g

2011

LENOVO A668T Phone

<main>
    <div class="container">
        <div class="page-header">
            <h1 class="page-header__title">LENOVO A668T</h1>
        </div>
        <div class="row row--no-margin">
            <div class="page-content">
                <div class="table-wrap">
                    <table class="table table--specs">
                        <tbody>
                            <tr class="expandlink">
                                <th rowspan="1">Network</th>
                                <td class="table__td table__td--style-2" style="min-width: 130px;"></td>
                                <td class="table__td">GSM, TD/SCDMA, GPRS, EDGE                                </td>
                            </tr>
                                                            <tr class="network-expand">
                                    
          <td style="border: none;"></td>
          <td class="table__td table__td--style-2">GSM</td>
          <td class="table__td">900, 1800, 1900</td>                                </tr>
                                                                                                                                                                            <tr class="network-expand">
                                    
          <td style="border: none;"></td>
          <td class="table__td table__td--style-2">TD/SCDMA</td>
          <td class="table__td">2000</td>                                </tr>
                                                                                                                    
                            <tr class="network-expand">
                                
          <td style="border: none;"></td>
          <td class="table__td table__td--style-2">GPRS</td>
          <td class="table__td"><div class="fa fa-check"></div></td>                            </tr>                               
                            <tr class="network-expand">
                                
          <td style="border: none;"></td>
          <td class="table__td table__td--style-2">EDGE</td>
          <td class="table__td"><div class="fa fa-check"></div></td>                            </tr>                              
                            <tr class="network-expand">
                                
          <td style="border: none;"></td>
          <td class="table__td table__td--style-2">EV-DO</td>
          <td class="table__td"><div class="fa fa-close"></div></td>                            </tr>                              
                                                                                 
                                                                                    <tr>
                                <th rowspan="1">Display</th>
                                <td class="table__td table__td--style-2">Primary</td>
                                <td class="table__td">
                                    TFT 4" 800 x 480 pixels 16M colors<br />WVGA, 233 ppi                                </td>
                            </tr>                             
                            <tr>
                                <td style="border: none"></td>
                                <td class="table__td table__td--style-2">Secondary</td>
                                <td class="table__td">
                                    <div class="fa fa-close"></div>                                </td>
                            </tr>                                
                            <tr>
                                <th rowspan="1">Camera</th>
                                <td class="table__td table__td--style-2">Primary</td>
                                <td class="table__td">
                                    5 MP 2592 x 1944 pixels <br />                                </td>
                            </tr>                               
                                                           
                            <tr>
                                <td style="border: none"></td>
                                <td class="table__td table__td--style-2">Secondary</td>
                                <td class="table__td">
                                    0.3 MP 640 x 480 pixels <br />                                </td>
                            </tr>                             
                            <tr>
                                <th rowspan="1">CPU</th>
                                <td class="table__td table__td--style-2">Chipset</td>
                                <td class="table__td">
                                    Unknown. Do you know this information?                                </td>
                            </tr>                               
                                                            <tr>
                                    <td style="border: none"></td>
                                    <td class="table__td table__td--style-2">CPU Speed</td>
                                    <td class="table__td">1 GHz                                    </td>
                                </tr>
                                                           
                                                                                        <tr>
                                    <th rowspan="1">Memory</th>
                                    <td class="table__td table__td--style-2">RAM</td>
                                    <td class="table__td">512 MB                                    </td>
                                </tr>
                                                          
                                                         
                            <tr>
                                <td style="border: none"></td>
                                <td class="table__td table__td--style-2">Memory Card</td>
                                <td class="table__td">MicroSD, Up to 32 GB                                </td>
                            </tr>
                            <tr>
                                <th rowspan="1">OS</th>
                                <td class="table__td table__td--style-2">System</td>
                                <td class="table__td">Android 2.3 Gingerbread                                </td>
                            </tr>
                            <tr>
                                <th rowspan="1">General</th>
                                <td class="table__td table__td--style-2">SIM</td>
                                <td class="table__td">Mini-SIM, Single-SIM                                </td>
                            </tr>                              
                                                        <tr>
                                <td style="border: none"></td>
                                <td class="table__td table__td--style-2">Dimension</td>
                                <td class="table__td">122 x 64 x 11.2 mm                                </td>
                            </tr>
                                                        
                                                        <tr>
                                <td style="border: none"></td>
                                <td class="table__td table__td--style-2">Weight</td>
                                <td class="table__td">125 g                                </td>
                            </tr>
                                                            
                                                        <tr>
                                <td style="border: none"></td>
                                <td class="table__td table__td--style-2">Released</td>
                                <td class="table__td">2011                                </td>
                            </tr>
                                                        
                                                         
                            <tr>
                                <td style="border: none"></td>
                                <td class="table__td table__td--style-2">Colors</td>
                                <td class="table__td">black, gray, brown, purple                                </td>
                            </tr>                                
                            <tr>
                                <th rowspan="1">Connectivity</th>
                                <td class="table__td table__td--style-2">USB</td>
                                <td class="table__td"><div class="fa fa-check"></div> Micro-USB 2.0                                 </td>
                            </tr>                               
                            <tr>
                                <td style="border: none"></td>
                                <td class="table__td table__td--style-2">WI-FI</td>
                                <td class="table__td"><div class="fa fa-check"></div> 802.11 b/g/n 0                                </td>
                            </tr>                               
                            <tr>
                                <td style="border: none"></td>
                                <td class="table__td table__td--style-2">Infrared</td>
                                <td class="table__td"><div class="fa fa-close"></div>                                </td>
                            </tr>                              
                            <tr>
                                <td style="border: none"></td>
                                <td class="table__td table__td--style-2">NFC</td>
                                <td class="table__td"><div class="fa fa-close"></div>                                </td>
                            </tr>                              
                            <tr>
                                <td style="border: none"></td>
                                <td class="table__td table__td--style-2">Hotknot</td>
                                <td class="table__td"><div class="fa fa-close"></div>                                </td>
                            </tr>                               
                            <tr>
                                <td style="border: none"></td>
                                <td class="table__td table__td--style-2">HDMI</td>
                                <td class="table__td"><div class="fa fa-close"></div>                                </td>
                            </tr>                               
                            <tr>
                                <td style="border: none"></td>
                                <td class="table__td table__td--style-2">GPS</td>
                                <td class="table__td"><div class="fa fa-check"></div> A-GPS                                </td>
                            </tr>                                
                            <tr>
                                <td style="border: none"></td>
                                <td class="table__td table__td--style-2">Bluetooth</td>
                                <td class="table__td"><div class="fa fa-close"></div>                                </td>
                            </tr>
                                                            <tr>
                                    <th rowspan="1">Features</th>
                                    <td class="table__td table__td--style-2">Sensors</td>
                                    <td class="table__td">Light, Gravity, Distance                                    </td>
                                </tr>
                                                            
                            <tr>
                                <td style="border: none"></td>
                                <td class="table__td table__td--style-2">Waterproof</td>
                                <td class="table__td"><div class="fa fa-close"></div>                                </td>
                            </tr>                               
                            <tr>
                                <td style="border: none"></td>
                                <td class="table__td table__td--style-2">Dustproof</td>
                                <td class="table__td"><div class="fa fa-close"></div>                                </td>
                            </tr>                               
                            <tr>
                                <td style="border: none"></td>
                                <td class="table__td table__td--style-2">Shock resistant</td>
                                <td class="table__td"><div class="fa fa-close"></div>                                </td>
                            </tr>                                
                            <tr>
                                <th rowspan="1">Sound</th>
                                <td class="table__td table__td--style-2">Headphone</td>
                                <td class="table__td"><div class="fa fa-check"></div> 3.5mm                                </td>
                            </tr>
                                                            <tr>
                                    <th rowspan="1">Battery</th>
                                    <td class="table__td table__td--style-2">Capacity</td>
                                    <td class="table__td">1500 mAh Li-Ion                                    </td>
                                </tr>
                                                            
                                                            <tr>
                                    <td style="border: none"></td>
                                    <td class="table__td table__td--style-2">Stand by</td>
                                    <td class="table__td">Up to 470 h                                    </td>
                                </tr>
                                                           
                                                            <tr>
                                    <td style="border: none"></td>
                                    <td class="table__td table__td--style-2">Talk time</td>
                                    <td class="table__td">Up to 6 h                                    </td>
                                </tr>
                                                         
                        </tbody>
                    </table>
                </div>
            </div>
        </div>
    </div>
</main>
<br /><br />
    <a href="https://www.mobosdata.com/phone/lenovo-a668t">
        Specs for phone on page html LENOVO A668T    </a>
<style>
/*! normalize.css v4.1.1 | MIT License | github.com/necolas/normalize.css */
/**
 * 1. Change the default font family in all browsers (opinionated).
 * 2. Prevent adjustments of font size after orientation changes in IE and iOS.
 */
html {
  font-family: sans-serif;
  /* 1 */
  -ms-text-size-adjust: 100%;
  /* 2 */
  -webkit-text-size-adjust: 100%;
  /* 2 */ }

/**
 * Remove the margin in all browsers (opinionated).
 */
body {
  margin: 0; }

/* HTML5 display definitions
   ========================================================================== */
/**
 * Add the correct display in IE 9-.
 * 1. Add the correct display in Edge, IE, and Firefox.
 * 2. Add the correct display in IE.
 */
article,
aside,
details,
figcaption,
figure,
footer,
header,
main,
menu,
nav,
section,
summary {
  /* 1 */
  display: block; }

/**
 * Add the correct display in IE 9-.
 */
audio,
canvas,
progress,
video {
  display: inline-block; }

/**
 * Add the correct display in iOS 4-7.
 */
audio:not([controls]) {
  display: none;
  height: 0; }

/**
 * Add the correct vertical alignment in Chrome, Firefox, and Opera.
 */
progress {
  vertical-align: baseline; }

/**
 * Add the correct display in IE 10-.
 * 1. Add the correct display in IE.
 */
template,
[hidden] {
  display: none; }

/* Links
   ========================================================================== */
/**
 * 1. Remove the gray background on active links in IE 10.
 * 2. Remove gaps in links underline in iOS 8+ and Safari 8+.
 */
a {
  background-color: transparent;
  /* 1 */
  -webkit-text-decoration-skip: objects;
  /* 2 */ }

/**
 * Remove the outline on focused links when they are also active or hovered
 * in all browsers (opinionated).
 */
a:active,
a:hover {
  outline-width: 0; }

/* Text-level semantics
   ========================================================================== */
/**
 * 1. Remove the bottom border in Firefox 39-.
 * 2. Add the correct text decoration in Chrome, Edge, IE, Opera, and Safari.
 */
abbr[title] {
  border-bottom: none;
  /* 1 */
  text-decoration: underline;
  /* 2 */
  text-decoration: underline dotted;
  /* 2 */ }

/**
 * Prevent the duplicate application of `bolder` by the next rule in Safari 6.
 */
b,
strong {
  font-weight: inherit; }

/**
 * Add the correct font weight in Chrome, Edge, and Safari.
 */
b,
strong {
  font-weight: bolder; }

/**
 * Add the correct font style in Android 4.3-.
 */
dfn {
  font-style: italic; }

/**
 * Correct the font size and margin on `h1` elements within `section` and
 * `article` contexts in Chrome, Firefox, and Safari.
 */
h1 {
  font-size: 2em;
  margin: 0.67em 0; }

/**
 * Add the correct background and color in IE 9-.
 */
mark {
  background-color: #ff0;
  color: #000; }

/**
 * Add the correct font size in all browsers.
 */
small {
  font-size: 80%; }

/**
 * Prevent `sub` and `sup` elements from affecting the line height in
 * all browsers.
 */
sub,
sup {
  font-size: 75%;
  line-height: 0;
  position: relative;
  vertical-align: baseline; }

sub {
  bottom: -0.25em; }

sup {
  top: -0.5em; }

/* Embedded content
   ========================================================================== */
/**
 * Remove the border on images inside links in IE 10-.
 */
img {
  border-style: none; }

/**
 * Hide the overflow in IE.
 */
svg:not(:root) {
  overflow: hidden; }

/* Grouping content
   ========================================================================== */
/**
 * 1. Correct the inheritance and scaling of font size in all browsers.
 * 2. Correct the odd `em` font sizing in all browsers.
 */
code,
kbd,
pre,
samp {
  font-family: monospace, monospace;
  /* 1 */
  font-size: 1em;
  /* 2 */ }

/**
 * Add the correct margin in IE 8.
 */
figure {
  margin: 1em 40px; }

/**
 * 1. Add the correct box sizing in Firefox.
 * 2. Show the overflow in Edge and IE.
 */
hr {
  box-sizing: content-box;
  /* 1 */
  height: 0;
  /* 1 */
  overflow: visible;
  /* 2 */ }

/* Forms
   ========================================================================== */
/**
 * 1. Change font properties to `inherit` in all browsers (opinionated).
 * 2. Remove the margin in Firefox and Safari.
 */
button,
input,
select,
textarea {
  font: inherit;
  /* 1 */
  margin: 0;
  /* 2 */ }

/**
 * Restore the font weight unset by the previous rule.
 */
optgroup {
  font-weight: bold; }

/**
 * Show the overflow in IE.
 * 1. Show the overflow in Edge.
 */
button,
input {
  /* 1 */
  overflow: visible; }

/**
 * Remove the inheritance of text transform in Edge, Firefox, and IE.
 * 1. Remove the inheritance of text transform in Firefox.
 */
button,
select {
  /* 1 */
  text-transform: none; }

/**
 * 1. Prevent a WebKit bug where (2) destroys native `audio` and `video`
 *    controls in Android 4.
 * 2. Correct the inability to style clickable types in iOS and Safari.
 */
button,
html [type="button"],
[type="reset"],
[type="submit"] {
  -webkit-appearance: button;
  /* 2 */ }

/**
 * Remove the inner border and padding in Firefox.
 */
button::-moz-focus-inner,
[type="button"]::-moz-focus-inner,
[type="reset"]::-moz-focus-inner,
[type="submit"]::-moz-focus-inner {
  border-style: none;
  padding: 0; }

/**
 * Restore the focus styles unset by the previous rule.
 */
button:-moz-focusring,
[type="button"]:-moz-focusring,
[type="reset"]:-moz-focusring,
[type="submit"]:-moz-focusring {
  outline: 1px dotted ButtonText; }

/**
 * Change the border, margin, and padding in all browsers (opinionated).
 */
fieldset {
  border: 1px solid #c0c0c0;
  margin: 0 2px;
  padding: 0.35em 0.625em 0.75em; }

/**
 * 1. Correct the text wrapping in Edge and IE.
 * 2. Correct the color inheritance from `fieldset` elements in IE.
 * 3. Remove the padding so developers are not caught out when they zero out
 *    `fieldset` elements in all browsers.
 */
legend {
  box-sizing: border-box;
  /* 1 */
  color: inherit;
  /* 2 */
  display: table;
  /* 1 */
  max-width: 100%;
  /* 1 */
  padding: 0;
  /* 3 */
  white-space: normal;
  /* 1 */ }

/**
 * Remove the default vertical scrollbar in IE.
 */
textarea {
  overflow: auto; }

/**
 * 1. Add the correct box sizing in IE 10-.
 * 2. Remove the padding in IE 10-.
 */
[type="checkbox"],
[type="radio"] {
  box-sizing: border-box;
  /* 1 */
  padding: 0;
  /* 2 */ }

/**
 * Correct the cursor style of increment and decrement buttons in Chrome.
 */
[type="number"]::-webkit-inner-spin-button,
[type="number"]::-webkit-outer-spin-button {
  height: auto; }

/**
 * 1. Correct the odd appearance in Chrome and Safari.
 * 2. Correct the outline style in Safari.
 */
[type="search"] {
  -webkit-appearance: textfield;
  /* 1 */
  outline-offset: -2px;
  /* 2 */ }

/**
 * Remove the inner padding and cancel buttons in Chrome and Safari on OS X.
 */
[type="search"]::-webkit-search-cancel-button,
[type="search"]::-webkit-search-decoration {
  -webkit-appearance: none; }

/**
 * Correct the text style of placeholders in Chrome, Edge, and Safari.
 */
::-webkit-input-placeholder {
  color: inherit;
  opacity: 0.54; }

/**
 * 1. Correct the inability to style clickable types in iOS and Safari.
 * 2. Change font properties to `inherit` in Safari.
 */
::-webkit-file-upload-button {
  -webkit-appearance: button;
  /* 1 */
  font: inherit;
  /* 2 */ }

.footer {
  background-color: #00394e;
  color: #a7c3ce;
  font-size: 14px;
  line-height: 1.5em;
  margin-top: 30px; }
  @media (min-width: 500px) {
    .footer {
      margin-top: 60px; } }
  @media (min-width: 768px) {
    .footer {
      margin-top: 90px; } }
  .footer__row {
    margin: 0 -8px;
    padding: 12px 0; }
    .footer__row::after {
      clear: both;
      content: "";
      display: table; }
  .footer__col {
    float: left;
    padding: 12px 8px;
    width: 100%; }
    @media (min-width: 500px) {
      .footer__col {
        width: 50%; } }
    @media (min-width: 992px) {
      .footer__col {
        width: 25%; } }
  .footer__title {
    color: #2da2cf;
    font-size: 16px;
    font-weight: bold;
    text-transform: uppercase; }

.footer-list {
  list-style: none;
  padding: 0; }
  .footer-list__link {
    color: inherit;
    text-decoration: none;
    transition: .2s color; }
    .footer-list__link:hover, .footer-list__link:focus {
      color: #fff; }
  .footer-list__item {
    border-bottom: 1px solid #174b5e;
    padding: 7px 0; }

.copyright {
  background-color: #003042;
  color: #a7c3ce;
  font-size: 12px; }
  @media (max-width: 449px) {
    .copyright {
      padding: 15px 0;
      text-align: center; } }
  @media (min-width: 450px) {
    .copyright__row {
      -ms-flex-align: center;
      align-items: center;
      display: -ms-flexbox;
      display: flex;
      -ms-flex-pack: justify;
      justify-content: space-between; } }
  @media (max-width: 449px) {
    .copyright .copyright__left {
      margin-bottom: 15px; } }
  .copyright .copyright__left a {
    color: inherit;
    text-decoration: none;
    transition: .2s color; }
    .copyright .copyright__left a:hover, .copyright .copyright__left a:focus {
      color: #d1e4eb; }

.social {
  font-size: 0; }
  .social__link {
    color: #fff;
    display: inline-block;
    font-size: 16px;
    line-height: 39px;
    text-align: center;
    transition: .2s opacity;
    width: 39px; }
    .social__link:hover, .social__link:focus {
      opacity: .8; }
    .social__link--youtube {
      background-color: #da1212; }
    .social__link--twitter {
      background-color: #1cc2f2; }
    .social__link--google-plus {
      background-color: #e85050; }
    .social__link--facebook {
      background-color: #225bc3; }

.table {
  border-spacing: 0;
  width: 100%; }
  .table td, .table th {
    border-bottom: 1px solid #f2f2f2;
    padding: 9px 23px;
    text-align: left;
    vertical-align: top; }
  .table th {
    color: #2da2cf;
    text-transform: uppercase;
    width: 1px; }
  .table tr:first-child > * {
    border-top: 1px solid #f2f2f2; }
  .table__td {
    color: #787878;
    position: relative; }
    .table__td--style-2 {
      font-weight: bold;
      width: 1px; }
  .table-wrap {
    min-height: .01%;
    overflow-x: auto; }
    @media (max-width: 767px) {
      .table-wrap {
        -ms-overflow-style: -ms-autohiding-scrollbar;
        margin-bottom: 15px;
        overflow-y: hidden;
        width: 100%; } }
  .table .fa-check {
    color: #6abb00; }
  .table .fa-close {
    color: #ca3d3d; }
  .table--specs {
    margin-bottom: 70px; }
  .table--compare td, .table--compare th {
    padding: 9px 15px; }
  .table--compare tr:not(:first-child):hover td, .table--compare tr:not(:first-child):hover th {
    background-color: #f7f7f7; }
  .table--compare tr:first-child td, .table--compare tr:first-child th {
    border-top: none; }
  .table--compare .search {
    margin-bottom: 30px; }
  .table--compare .table__th {
    max-width: 120px;
    width: 120px; }
  .table--compare .table__td {
    min-width: 190px;
    width: 20%; }
    .table--compare .table__td--style-2 {
      max-width: 95px; }
    .table--compare .table__td--compare-header {
      padding-bottom: 40px; }
    .table--compare .table__td--compare-empty {
      background-image: url("../images/add-compare.jpg");
      background-repeat: no-repeat;
      background-position: center; }

body {
  font-family: Arimo, sans-serif;
  font-size: 14px; }

* {
  box-sizing: border-box; }

img {
  height: auto;
  max-width: 100%; }

a {
  text-decoration: none; }

.container {
  margin: 0 auto;
  max-width: 1170px;
  padding: 0 15px;
  position: relative; }

.row {
  margin: 0 -7px; }
  .row::after {
    clear: both;
    content: "";
    display: table; }
  .row--no-margin {
    margin: 0; }
  .row--spacing {
    margin-top: 20px; }

.col {
  float: left;
  padding: 0 7px;
  width: 100%; }
  @media (max-width: 499px) {
    .col--6 + .col--6 {
      margin-top: 15px; } }
  @media (min-width: 500px) {
    .col--6 {
      width: 50%; } }

@media (min-width: 992px) {
  .page-content,
  .sidebar {
    float: left; } }

@media (min-width: 992px) {
  .page-content {
    padding-left: 100px;
    width: 82.5%; } }

.sidebar {
  text-align: center; }
  .sidebar img {
    max-width: 200px; }
  @media (min-width: 992px) {
    .sidebar {
      padding-left: 20px;
      width: 17.5%; } }
  @media (max-width: 991px) {
    .sidebar {
      margin-bottom: 30px; } }

.page-header {
  border-bottom: 1px solid #f2f2f2;
  margin-bottom: 23px;
  padding-bottom: 18px; }
  .page-header__title {
    margin: 0;
    text-transform: uppercase; }
    .page-header__title small {
      display: block;
      font-size: 19px;
      font-weight: normal;
      margin-top: 5px; }
  @media (min-width: 900px) {
    .page-header {
      -ms-flex-align: center;
      align-items: center;
      display: -ms-flexbox;
      display: flex;
      -ms-flex-pack: justify;
      justify-content: space-between; }
      .page-header__title {
        padding-right: 20px; } }

.table tr:first-child > * {
  border-top: none !important; }

.header-spec-download-header {
  background-color: #f7f7f7;
  border-bottom: 1px solid #cee0ee;
  margin-bottom: 40px; }

@media (min-width: 400px) {
  .header-spec-download {
    -ms-flex-align: center;
    align-items: center;
    display: -ms-flexbox;
    display: flex;
    -ms-flex-pack: justify;
    justify-content: space-between;
    height: 125px; } }

@media (max-width: 399px) {
  .header-spec-download {
    padding: 30px 0; } }

.header-spec-download a {
  color: #06353b;
  display: inline-block;
  font-size: 17px; }
  @media (max-width: 399px) {
    .header-spec-download a {
      margin-top: 10px; } }

.footer {
  margin-top: 0 !important; }
</style>

Network		GSM, TD/SCDMA, GPRS, EDGE
	GSM	900, 1800, 1900
	TD/SCDMA	2000
	GPRS
	EDGE
	EV-DO
Display	Primary	TFT 4" 800 x 480 pixels 16M colors WVGA, 233 ppi
	Secondary
Camera	Primary	5 MP 2592 x 1944 pixels
	Secondary	0.3 MP 640 x 480 pixels
CPU	Chipset	Unknown. Do you know this information?
	CPU Speed	1 GHz
Memory	RAM	512 MB
	Memory Card	MicroSD, Up to 32 GB
OS	System	Android 2.3 Gingerbread
General	SIM	Mini-SIM, Single-SIM
	Dimension	122 x 64 x 11.2 mm
	Weight	125 g
	Released	2011
	Colors	black, gray, brown, purple
Connectivity	USB	Micro-USB 2.0
	WI-FI	802.11 b/g/n 0
	Infrared
	NFC
	Hotknot
	HDMI
	GPS	A-GPS
	Bluetooth	A2DP
Features	Sensors	Light, Gravity, Distance
	Waterproof
	Dustproof
	Shock resistant
Sound	Headphone	3.5mm
Battery	Capacity	1500 mAh Li-Ion
	Stand by	Up to 470 h
	Talk time	Up to 6 h

Report an error

LENOVO A668T full specifications

LENOVO A668T Phone

related phones

LENOVO K15 PLUS

LENOVO LEGION Y70

LENOVO K14

LENOVO K14 PLUS