T-Mobile offers competitively priced plans and extensive international roaming.
Please see CNET's Cell phone plan finder to purchase a phone with T-Mobile service.
US wireless customers now have new options to call and message family and friends in Cuba.
But there's a catch: You have to commit to a new smartphone as part of the new upgrade program. Also, only a select number of flagship phones are available for an upgrade.
The carrier is also guaranteeing that prices won't increase for customers on existing plans -- even if you're on a promotional program.
Prices for each line range between $10 and $16 depending on the number of accounts. T-Mobile is also bundling a free domain and Microsoft Office 365 services for any company paying for additional data.
The prepaid carrier gives customers unlimited access to high-speed data, but with a few caveats.
Both carriers have similar programs that allow customers to carry unused data from one month to the next, but it's not as simple as it sounds. This is how these rollover data plans really work.
CNET's Dan Graziano explains the difference between T-Mobile and AT&T's rollover data programs.
The FCC says it won't vote to increase the spectrum reserved for smaller carriers in the upcoming wireless auction.
The Simply Prepaid plan puts T-Mobile in direct competition with its own prepaid arm, MetroPCS, which may actually still provide a better value for some.