My son had a previous Gabb phone that was lost. We upgraded to the Gabb Phone 4 and now I can't activate it. It says the QR code is invalid, when I put in the IMEI number manually it says I need a plan but when I go to my app and dashboard it says I already have a plan. It basically keeps going around in circles. We don't have his old phone to pull the SIM card so not sure if that's part of the issue? When I unassign his old phone from his account, then try to assign a new device it only shows me his old phone as an option. What am I missing?