My iphone Model No: A1303. Is it 3G or 3GS?

3GS.

Introduced June 2009 (16 and 32 GB) June 2010 (8 GB)

Discontinued June 2010 (16 and 32 GB) September 2012 (8 GB)

Model Identifier iPhone2,1

Model Number A1303

EMC 2315

Order Number MB715LL/A (16 GB Black), MB716LL/A (16 GB White), MB717LL/A (32 GB Black), MB718LL/A (32 GB White), MC555LL/A (8GB)

Entering "A1303" into a search engine seems simpler. 🙂

It's an iPhone 3GS.

(79586)

If you go to Klantenservice: Serienummers and enter your serial number it will tell you