Can anyone please point me in the right direction I have sold a phone as unlocked to Music Magpie. the phone was originally bought from the BT shop, I still have the invoice & box clearly marked as EE - Unlocked. I have used several different network sims in the phone (Samsung A90 5G) including EE & 3. I have sold the phone to Music Magpie, who are telling me the phone is locked to O2/Giff ...