Can I temporarily switch my number back to my old phone? It is a moto x 2nd edition
Yes you can activate it again. Activate My Phone
Keep in mind that if you deactivate the Moto X Pure that it will also deactivate the SIM card and you will need to get a new SIM card before you can move back to the Pure after it is repaired.
might want to add if the Moto X Pure was on CDMA coverage when you get a new SIM it will be GSM coverage
I would but I can check that on my side, so I omitted it for the OP’s clarification