I am going to be traveling in England and Scotland this summer. Will my phone work there? If not, what do I need to do to make it work?
Do Republic Wireless Beta/1.0/2.0 plans include international?
No. However, you can use any Republic Wireless phone on WiFi anywhere in the world to call or text to U.S. and Canadian phone numbers.
There isn’t much else you can do. Your Moto X 2nd gen will not allow you to install a UK based SIM card.
You may find this of interest: International Travel with a Republic Phone.