Device shouldnt get locked to any carrier in Canada. Thats the Law, if it does get locked call the supposed carrier and ha e them unlock, unlocking should be free.
Firstly check your PM account to see if you have used the all the alloted data cap or not. If you still have allotted data then try your PM Sim card on different phone like on a old phone or a friend/family members phone. If PM sim card work fine on ...