Here are some of the very basic things that you must have to know about the Xfinitymobile.come/activate
While you are using Xfinitymobile.come/activate then also keep your bill copy and their PIN
Always backup your data, do not forget otherwise you lose it.
You can also activate a new SIM and use your old one.
For more visit: https://thewebbings.com/xfinitymobile-com-activate/