Unable to activate iPhone 11 Pro Max
After restoring iPhone to factory settings due to a faulty upgrade the iPhone will not activate.
I have tried both in iTunes and finder on two different MacBook pros. On a windows laptop with iTunes installed. Multiple wifi networks, and multiple SIM cards. Without SIM card. Bluetooth transfer placing phone next to another device.
The usual error is either that an update is required to activate my phone, or that the iPhone cannot be synced and operation timed out.
Really at a loss. I spent a solid 7 hours trying yesterday, and am two hours in today. Any other suggestions before I accept defeat?
iPhone 11 Pro Max