The potential shift from four major U.S. wireless carriers to three could lead to big changes to your cell phone plans and service.

On Sunday, T-Mobile and Sprint announced plans for a $26 billion merger, combining the two companies into what would be a bigger No. 3 network, behind AT&T and Verizon.

The deal still awaits regulatory approval and raises plenty of questions if you pay Sprint or T-Mobile for your service.More at USA Today