I bought a Samsung Galaxy S6 with Telus two years ago. I recently got a new, unlocked phone and want to give away the old Galaxy S6 to my mother, who lives abroad. But the Galaxy S6 is locked and won't accept any other SIM card (I've tested) and returns a "Invalid SIM Card" error, and a screen for me to type a Network Unlock Code, which I don't have.
I have been trying to call Telus for DAYS and not a single time they even answered the phone. I wanted to send the phone as a Christmas gift and Telus is causing my life to be way more complicated than it should. Please fix this ASAP