Confused about the TP2! GSM/CDMA confusion

[bobda]

Hi!

I just got the TP2 as a gift! The fact that it's a CDMA/GSM phone has me really excited. But after reading through some of the threads here, i'm a bit confused.


Question 1.): If this phone is both a CDMA and GSM phone, why are there different custom ROMs for CDMA and GSM?

Question 2.): If I flash a CDMA ROM will I still be able to SIM unlock my phone and use a ATT or T-Mobile card? Can I switch between CDMA and GSM networks on-the-fly?

Question 3.): After flashing to a custom CDMA ROM, if I travel to Hong Kong, can I just pop in a pay-as-you-go SIM card and have it working? And will the data work (assuming I get a SIM card with a data package)?

Question 4.): What is the difference between the RhodiumW/Sprint/Verizon/Telus Touch Pro 2 CID/Security/SIM Unlocker, and the Sprint Unlocker - RhodiumW WU Radio Unlocked for US Networks? Reading the threads with my limited understanding, it seems like they both dot he same thing for my phone: allow the Sprint phone to use a SIM card from any network, right?


I'm on Sprint right now. That's a CDMA network, right? I was using a Diamond before, and i just had to unlock (HSPL, right?) it and flash to a custom ROM made for the CDMA Diamond.

Before Sprint, I used ATT, and that's a GSM network, I brought my 8125 to a local store to get it SIM unlocked, and I was able to use that phone on T-mobile. I was also able to pop in a pay-as-you-go SIM card when I was in HK and it worked fine.


Thanks!

Bob