Z710i Unlock/debranding questions

[KDickie]

I’m new to SE Phones and the whole unlocking debranding, but I’ve been trying to read quite a bit. I recently purchased a slightly used Z710i which was locked to Fido. I was planning to unlock/debrand it to use with my Rogers plan which I still have a year of commitment.

I unlocked the phone with GSMLiberty which seemed to go well, but now the phone has an unusual problem. The display shuts off when you close the clam shell or when it goes into screensaver mode. I have to shut the phone off and turn it on again to get the display back. I was hoping that when I debrand it, it would clear the problem. At present it is at CID49, would it help to upgrade it to CID50/51? What is the best program to use to bebrand/upgrade, XS++ or SETools Lite?

Any help would be appreciated. Thanks.