My phone’s account number?
I used an iPhone XR. with Qlink ofQuincy company MA 02169 Now I want to use it with another company that need my phone’s account number , but I don’t know.
Are you sure they’re asking for an account number? They may be asking for your iPhone’s IMEI number. (Settings>General>About, scroll down until you see IMEI).
Within Settings>General>About, you can also find your phone’s serial number, model number, etc.
Hope this helps.