We've had T-Mobile for the past 8 years and overall have not had any major problems with them. We have the family plan for 5 phones with unlimited talk and text. 1 phone has the 5 GB data plan with tethering, 3 with 2 GB data, and 1 phone with no data plan. It's good to know that T-Mobile is making a big effort to expand their coverage and with all their options for phones and plans it will get even better.