I have a fido I747m I baught off someone and tried before buying it to see if my rogers and Pc mobile sim works. Did placed call and was ok. After placing a few calls I was having trouble getting them to go through. Only 10-30% of calls go through. I noticed the signal strength is one bar and increase to full when placing the call and if it does quickly the call will go through if there is a delay the call wont go through. Now to receive calls I cant unlesss by chance I have more than one bar when someone is trying to call me so less than 1% of calls I receive. I've wiped and reflashed the fido rom bell rom and the new pc mobile rom the result is the same. Turned on/off airplane mode to get to work for less than a minute. Ive rooted the phone and modified to downgrade to 4.1.2 still no luck. Some people are telling it may have been unlocked badly. What can I do. I want to try to flash EFS but Im seeing I need to jtag which I dont have. Please let me know what I can do or if there is nothing that can be done.