[mothered]

I am just concerned about the block of the imei.

There Is a workaround by changing the IMEI number, yet still keep It assigned to the device It's dedicated to.

The first 8 digits of the IMEI number known as the TAC (Type Allocation Code), Is what Identifies the model & device manufacturer. When changing It, leave those digits as Is and spoof the rest. As such, the IMEI number will show up to It's corresponding device when activating.

How does one change the IMEI?

There's no simple way of explaining It, but there are a number of methods and tools- Flasher, Device ID Changer (that's failed me more so than not), BS-IMEI etc.

Some require rooting the device.