1. for unlocking the phone take a look at the video tutorial i made st the link below, i was verizon just made on customers sprint phone and works fine. the links to what you need are in the description under the video:
http://www.youtube.com/watch?v=te7CPM3yeUk
2. the radio is what picks up the signal for our device. of course if you have a radio that works better in yoru area you are going ot get better signal resulting in faster speeds and prolonged battery life.
3. installing a rom is also covered in the unlocking and flashing video from #1
4. on installing cabs as long as they arent provider or gsm specific they will work no problem on your phone.... you can install any app as long as it isnt the carrier specific like sprint navigation or spritn music on a verizon device or vice versa.
1. for what version of sense you are running you can tell by going to the settigns tab on touchlo than go to software information and you will find windows versio as well as manila version.
2. for the most part sprint and the verizon tp2 are same, the keyboards and the coloring of the housign are different colors as well as one being a 500 and one a 400 model. (verizon is the 500 and the better of the two)
3. yes you can install cabs without unlocking the device... unlcoking is only to allow you to flash custom roms. you can install any cab that works and is compatible with the rom that you are running.