12-16-2009, 08:27 AM
Join Date: Mar 2008
Location: Austin, TX
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There are differences. Each carrier has their own build of the OS. They also use different themes.
Different carriers also have different network types - CDMA vs, GPRS, etc. Some carriers restrict GPS operation, some don't.
If possible, you should try to use the simulator for the carrier/device you are targeting.
In general, here are the importance of the various factors.
1. OS Level (most important)
2. Device - for example, touch vs. trackball, GPS-capable, screen size