I’m looking to buy a phone off someone. It’s new in box. He said it’s a upgrade handset, so if I buy it and he doesn’t pay bill will the phone be blocked, I will be using my own sim card, but will the phone be blocked for non payment. I bought a phone a few year back off someone and it was a 02 refresh phone so they pay for the phone separately and he didn’t pay the bill I assume and the phone was blocked I tried different SIM card.. I just don’t want it happen again.. also will it be unlocked to use any sim as I will be using ee SIM card and not id mobile.