I currently am using a moto E 2nd generation with my grandfathered 1.0 plan and I would like to upgrade to the moto X 2nd generation. Can I still do this? And if so, how?
You will first need to acquire a used Moto X2 from third party resellers such as Ebay or Swappa.
Be sure to confirm that it is the Republic Wireless custom version of this phone.
See here for additional details
Then you can reactivate it as an upgrade/replacement to your existing line of service on the moto E2
At the end of the activation process, your Moto E2 will be deactivated.