Hello all, Am looking for my first iPhone. Wish to use for data only with an iPad sim (in an adapter). Am thinking 3G or 3GS that can be (or is) unlocked. Most sellers have no idea what boot rom version their phone has and some do not even know the OS. Finding the boot rom version does not appear to be a simple task, unlike "settings>general>about" for OS version. 1) Do I need to look for only phones with OS 3.1.2 or that are already unlocked? Or can I purchase any phone and restore to 3.1.2 with downloaded software (i.e. redmondpie.com)? 2) Any other tips or things to check like the vibrate switch etc.? Battery life? Thanks in advance!