I have a BB 9700 that was locked to Orange UK. I got it unlocked and verified that network & simcard in MEP are disabled and I could use any operator SIM with it. I used it for a year with a different operator and then I moved to Canada.
Here I realized that it does not work with any operator's SIM :( .I tried Rogers, Telus, Bell and none worked with it. What could be wrong with my phone ? Is there some other lock that is still in place ?