Long story short, I bought an unlocked Iphone 15 Pro Max from Apple (paid in full) and gifted it to my friend. Yesterday suddenly the phone IMEI shows that it is blacklisted by Bell Mobility. The weird part is that I am the first owner of the phone and the phone was only used by my friend. This was purchased from Apple officially. My friend who was using the phone used FIDO which is not even Bell Mobility. I went to Apple store and they said they cannot do anything. FIDO (my provider) says this phone cannot be used in North America ever as it it blacklisted.
What are my solutions? And any idea what and why this happened?