I called fido, they gave me a code for unlocking the phone I brought from fido, when inserting a new PM sim card into this "fido"phone, I needed to enter the code they gave me, then good to go!
I activated at walmart on August 24th in store, got free SIM card, 30days-$10 plan, the next day PM credited me $25 + $2 autopay, so currently my PM balance is $27, and next pay due is $0 on Sept.24. Excellent!