A group of Democratic lawmakers -- led by Senators Amy Kloubach and Elizabeth Warren --  recently expressed their concern over the potential merger between T-Mobile and Sprint.

Currently touted as the number three and number four cell phone providers in the country, the senators’ main concern involved the effect a deal would have on consumers nationwide, namely higher costs for services.

“T-Mobile and Sprint have led the way in offering wireless products and service options that are more appealing to lower-income consumers, including no contract plans, prepaid and no credit check plans, and unlimited, text, voice, and data plans,” the senators wrote.