I installed Rogers HTC 621 - 1.30.631.2 (WM6)
That I found here:
The problem is that, now, when I want to leave this ROM because I've been having some problems with it, it won't update. I've tried using SDA Unlock but it hasn't worked out. It always shows: unlockable phone, and right after this box it shows: phone unlocked. But it isn't. Could you guys help me solve this problem?!
Whenever I try installing any .cab files it shows the following message:
Installation was unsuccessful. The program or setting cannot be installed because it does not have sufficient system permissions.
If you could help me solve this only problem I wouldn't even need to update the ROM...