App unlocking the C550 on the Orange developers site worked first time for me, all I needed to do was use Action Register first.
Don't forget if you are not in the UK or are not using an Orange SIM (in the UK) you need to application unlock using passthrough and not GPRS.
I do have SIM unlock and app unlock phone but I am still having some problems listed below, any advice/help would be highly appreciate:
1. I had Unlocked C500 phone before C550 and using file manager, I was able to move all the temp files under storage>windows>app mgr to sd card to free up some space. I am unable to perform this with C550? I get an error msg"temp file xyz could not be moved" or something like that. I did double check the app unlock values 1 and 40 as discussed on page 1. I can install any program and can delete any user installed files/programs except system files?
2. Sprite software: For some strange reason, it goes back and forth in privieged and unprivileged mode? Now it's stuck in unpriviliged mode. I tried contacting sprite software but I guess their website has been down for the last 2 days or so. I have read on this forum lot of people having trouble with Sprite back up, is there any other good back up programs out there? I have seen Sunnysoft or something like that but don't know if its good or not.