[dopdahtc]

Hi my friends,

Last time I tried to upgrade my Spanish-version HTC6800 which is customized by Mexico Iusacell, a CDMA operator, but failed at last because the mobile nubmer written to the phone was lost after I unlocked it and upgrade the SPL.

This time I read a lot of threads in this forum but the above problem still puzzles me. I have the following questions and hope you may make me clear:

1. Do I have to unlock the phone and upgrade the SPL if I want to use a GSP ROM?

2. Since I have to upgrade the ROM version, how can I backup the phone number information? I know the QPST must be used, but how to use it since I cannot unlock the phone.

Thanks for your reply.