I have the new iPad WiFi + 4G 16gb purchased in the UK, and the model on the back is A1430, yet in the OS it refers to MD366B. When I download the iOS 5.1 IPSW file, it refers to iPad3,3_5.1.1_9B206_Restore, so this is an iPad3,3 for OS purposes.
I've seen on several websites discussing OS revisions that there are 3 versions of the iPad 3, the WiFi only, WiFi + CDMA (or sometimes Verizon), and WiFi + GSM (or sometimes AT&T).
They talk about the GSM version being either 3,2 or 3,3. I assume this is a mistake on the sites.
So what is the best way to refer to the models, and why are there 3? Hardware model, iOS model, and IPSW model.