Experience with T-Mobile

I've grown very concerned about my Xfinity wifi bill. I've been a T-Mobile customer for a long time, and they've opened service in my neighborhood for basically half the price of Xfinity.  Is there a possibility that Xfinity might match the price. I've had Comcast/Xfinity for thirty- five years, and hate to change, but getting ready to retire and have to save money somehow. 

Any suggestions would be helpful.