1. I've read that there are 2 kinds of the Touch Pro 2?.. The GSM one and the CDMA one if i'm not mistaken? What's the difference between the two? and which one should I get?.. I'm from the Philippines by the way.
This would depend on which signal you carrier is running. you will need to call them and see what they are running and the frenquency.
2. I might get one off ebay, so usually they are T-Mobile, Sprint, etc. versions. What makes these carrier versions different from the normal HTC one? are they GSM or CDMA? and there's no difference in terms of hardware if i'm not mistaken, just the software right? Am I right that they do not have a front camera?
no front camera its on the back of the phone
3. If I get a T-Mobile or Sprint version, can i flash another ROM? I don't to use a carrier ROM. I like the one i see on the reviews on the net. Which one is that?
Please see
http://forum.ppcgeeks.com/showthread.php?t=93252 for CDMA unlocking and then
http://forum.ppcgeeks.com/showthread.php?t=95375 for flashing the rom. ROMS can be found here
http://forum.ppcgeeks.com/forumdisplay.php?f=98 .. remember this is CDMA only for all of these links
4. If I get a T-Mobile or Sprint version, do I have to do some unlocking to be able to use my sim card?
use this site
http://forum.ppcgeeks.com/forumdisplay.php?f=98 for CDMA phones and this site
http://forum.xda-developers.com/forumdisplay.php?f=490 for GSM phones
5. I know normally it comes with Windows Mobile 6.1. And i know it could be upgraded to 6.5. Would you guys recommend it? Is there an official HTC rom for WM6.5? and does WM6.5 still have TouchFLO3D?
Yes u can upgrade just pick your rom version that you want to flash to from one of the sites.
6. Is there a certain version of the Touch Pro 2 I should avoid? something to do with the radio band? I'm afraid it might not work with our cellular networks here, or I may not be able to use it at all.
Yes ... CDMA and GSM are 2 different bands (2 different phones) .. with in those signals they also run off different frenquencys call your carrier to see what they run off of.
7. I've read that there are some TP2s that have a 3.5mm earphone jack, and I want one of those. I've read that the Sprint version has it. But then I've also read somewhere that the Sprint version needs some special method of unlocking to be able to use other sims?
Yes the sprint one does have this hook up. all unlocking info is in the links i provided. just make sure you get the correct phone for your service.