Based on the model number of your iPhone, you will be able to identify which iOS firmware file you need to download.
You can find model number on the iPhone’s back cover.
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You can find model number on the iPhone’s back cover.
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Generation
</td> <td valign="top" width="106"> Model
</td> <td valign="top" width="106"> Variant
</td> <td valign="top" width="106"> Identifier
</td> </tr> <tr> <td valign="top" width="106">iPhone 2G</td> <td valign="top" width="106">A1203</td> <td valign="top" width="106">GSM</td> <td valign="top" width="106">iPhone1,1</td> </tr> <tr> <td rowspan="2" width="106">iPhone 3G</td> <td valign="top" width="106">A1241</td> <td valign="top" width="106">GSM</td> <td valign="top" width="106">iPhone1,2</td> </tr> <tr> <td valign="top" width="106">A1324</td> <td valign="top" width="106">GSM</td> <td valign="top" width="106">iPhone1,2</td> </tr> <tr> <td rowspan="2" width="106">iPhone 3GS</td> <td valign="top" width="106">A1303</td> <td valign="top" width="106">GSM</td> <td valign="top" width="106">iPhone2,1</td> </tr> <tr> <td valign="top" width="106">A1325</td> <td valign="top" width="106">GSM</td> <td valign="top" width="106">iPhone2,1</td> </tr> <tr> <td rowspan="3" width="106">iPhone 4</td> <td valign="top" width="106">A1332</td> <td valign="top" width="106">GSM</td> <td valign="top" width="106">iPhone3,1</td> </tr> <tr> <td valign="top" width="106">?</td> <td valign="top" width="106">GSM Rev A</td> <td valign="top" width="106">iPhone3,2</td> </tr> <tr> <td valign="top" width="106">A1349</td> <td valign="top" width="106">CDMA</td> <td valign="top" width="106">iPhone3,3</td> </tr> <tr> <td rowspan="2" width="106">iPhone 4S</td> <td valign="top" width="106">A1387</td> <td valign="top" width="106">GSM+CDMA</td> <td valign="top" width="106">iPhone4,1</td> </tr> <tr> <td valign="top" width="106">A1431</td> <td valign="top" width="106">GSM+CDMA</td> <td valign="top" width="106">iPhone4,1</td> </tr> <tr> <td rowspan="3" width="106">iPhone 5</td> <td valign="top" width="106">A1428</td> <td valign="top" width="106">GSM</td> <td valign="top" width="106">iPhone5,1</td> </tr> <tr> <td valign="top" width="106">A1429</td> <td valign="top" width="106">GSM+CDMA</td> <td valign="top" width="106">iPhone5,2</td> </tr> <tr> <td valign="top" width="106">A1442</td> <td valign="top" width="106">GSM+CDMA</td> <td valign="top" width="106">iPhone5,2</td> </tr> <tr> <td rowspan="6" width="106">iPhone 5s</td> <td valign="top" width="106">A1433</td> <td valign="top" width="106">GSM</td> <td valign="top" width="106">iPhone6,1</td> </tr> <tr> <td valign="top" width="106">A1533</td> <td valign="top" width="106">GSM</td> <td valign="top" width="106">iPhone6,1</td> </tr> <tr> <td valign="top" width="106">A1457</td> <td valign="top" width="106">GSM+CDMA</td> <td valign="top" width="106">iPhone6,2</td> </tr> <tr> <td valign="top" width="106">A1518</td> <td valign="top" width="106">GSM+CDMA</td> <td valign="top" width="106">iPhone6,2</td> </tr> <tr> <td valign="top" width="106">A1528</td> <td valign="top" width="106">GSM+CDMA</td> <td valign="top" width="106">iPhone6,2</td> </tr> <tr> <td valign="top" width="106">A1530</td> <td valign="top" width="106">GSM+CDMA</td> <td valign="top" width="106">iPhone6,2</td> </tr> <tr> <td rowspan="6" width="106">iPhone 5c</td> <td valign="top" width="106">A1456</td> <td valign="top" width="106">GSM</td> <td valign="top" width="106">iPhone5,3</td> </tr> <tr> <td valign="top" width="106">A1532</td> <td valign="top" width="106">GSM</td> <td valign="top" width="106">iPhone5,3</td> </tr> <tr> <td valign="top" width="106">A1507</td> <td valign="top" width="106">GSM+CDMA</td> <td valign="top" width="106">iPhone5,4</td> </tr> <tr> <td valign="top" width="106">A1516</td> <td valign="top" width="106">GSM+CDMA</td> <td valign="top" width="106">iPhone5,4</td> </tr> <tr> <td valign="top" width="106">A1526</td> <td valign="top" width="106">GSM+CDMA</td> <td valign="top" width="106">iPhone5,4</td> </tr> <tr> <td valign="top" width="106">A1529</td> <td valign="top" width="106">GSM+CDMA</td> <td valign="top" width="106">iPhone5,4</td> </tr> <tr> <td rowspan="4" width="106">iPhone 6 Plus</td> <td valign="top" width="106">A1522</td> <td valign="top" width="106">GSM/North America</td> <td valign="top" width="106">iPhone7,1</td> </tr> <tr> <td valign="top" width="106">A1522</td> <td valign="top" width="106">CDMA/Verizon</td> <td valign="top" width="106">iPhone7,1</td> </tr> <tr> <td valign="top" width="106">A1524</td> <td valign="top" width="106">Global/Sprint/A1586</td> <td valign="top" width="106">iPhone7,1</td> </tr> <tr> <td valign="top" width="106">A1593</td> <td valign="top" width="106">China Mobile</td> <td valign="top" width="106">iPhone7,1</td> </tr> <tr> <td rowspan="4" width="106">iPhone 6</td> <td valign="top" width="106">A1549</td> <td valign="top" width="106">GSM/North America</td> <td valign="top" width="106">iPhone7,2</td> </tr> <tr> <td valign="top" width="106">A1549</td> <td valign="top" width="106">CDMA/Verizon</td> <td valign="top" width="106">iPhone7,2</td> </tr> <tr> <td valign="top" width="106">A1586</td> <td valign="top" width="106">Global/Sprint/A1586</td> <td valign="top" width="106">iPhone7,2</td> </tr> <tr> <td valign="top" width="106">A1589</td> <td valign="top" width="106">China Mobile</td> <td valign="top" width="106">iPhone7,2</td></tr></tbody></table>
