How To Know Exact Firmware To Be Downloaded in your iPhone/iPad based on Model Number

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.

Refer to the table below to find out the identifier for your iPhone so you can figure out which iOS firmware file to download.

For example: You need to download iPhone5,2_8.1.2_12B440_Restore.ipsw file for your GSM+ CDMA iPhone 5 with model number A1429.

Generation	Model	Variant	Identifier
iPhone 2G	A1203	GSM	iPhone1,1
iPhone 3G	A1241	GSM	iPhone1,2
	A1324	GSM	iPhone1,2
iPhone 3GS	A1303	GSM	iPhone2,1
	A1325	GSM	iPhone2,1
iPhone 4	A1332	GSM	iPhone3,1
	?	GSM Rev A	iPhone3,2
	A1349	CDMA	iPhone3,3
iPhone 4S	A1387	GSM+CDMA	iPhone4,1
	A1431	GSM+CDMA	iPhone4,1
iPhone 5	A1428	GSM	iPhone5,1
	A1429	GSM+CDMA	iPhone5,2
	A1442	GSM+CDMA	iPhone5,2
iPhone 5s	A1433	GSM	iPhone6,1
	A1533	GSM	iPhone6,1
	A1457	GSM+CDMA	iPhone6,2
	A1518	GSM+CDMA	iPhone6,2
	A1528	GSM+CDMA	iPhone6,2
	A1530	GSM+CDMA	iPhone6,2
iPhone 5c	A1456	GSM	iPhone5,3
	A1532	GSM	iPhone5,3
	A1507	GSM+CDMA	iPhone5,4
	A1516	GSM+CDMA	iPhone5,4
	A1526	GSM+CDMA	iPhone5,4
	A1529	GSM+CDMA	iPhone5,4
iPhone 6 Plus	A1522	GSM/North America	iPhone7,1
	A1522	CDMA/Verizon	iPhone7,1
	A1524	Global/Sprint/A1586	iPhone7,1
	A1593	China Mobile	iPhone7,1
iPhone 6	A1549	GSM/North America	iPhone7,2
	A1549	CDMA/Verizon	iPhone7,2
	A1586	Global/Sprint/A1586	iPhone7,2
	A1589	China Mobile	iPhone7,2

Based on the identifier for your iPhone model, you can download the appropriate iOS firmware file or iOS software update for your iPhone from our download page.

Download IPSW for your iPhone and iPad

Source:IPHONEHACKS