How to Identify your iPhone
How to identify which iPhone you have:
iPhone 3G vs iPhone 3GS
The iPhone 3G and the iPhone 3GS are two models in the iPhone line that have a similar shape, which makes it difficult to tell them apart based on appearance alone. One of the easiest ways to tell is through the apps you have on your device. If you have the Compass, your phone is an iPhone 3GS. If you don’t, you own an iPhone 3G. Another feature that the iPhone 3GS has is Video. If your phone doesn’t have that function, you own an iPhone 3G.
iPhone 4 vs iPhone 4S
Telling an iPhone 4 from an iPhone 4S can also be tricky. The easiest way to differentiate the two is to check the back of your phone and refer to the model number. The iPhone 4 model numbers are A1349 and A1332 and the iPhone 4S model number is A1387.
The iPhone 5 may look like the previous iPhone models from afar, but the iPhone 5 is lighter, thinner and taller than the iPhone 4S. And while the iPhone screens look similar the back of the iPhone 5 is two-toned. The iPhone 5′s also have the model numbers A1428 and A1429.
iPhone 5C and iPhone 5S
The iPhone 5C comes in five bright colors (green, blue, yellow, red, and white) and its outer shell is made of hard plastic. The iPhone 5C carries one of the following model numbers; A1532, A1456, A1507, A1529. The iPhone 5S is two-toned like the iPhone 5, but the home button on the 5S does NOT have a square icon on it due to the Touch ID fingerprint scanner. The 5S comes in silver, space gray, and gold and the model numbers are A1533, A1453, A1457, A1530.