Sprint and T-Mobile have argued that their combination will create better service. But the deal could cause higher rates and hurt the employees of both companies. (Photo: Jonathan Weiss / Shutterstock.com)

As the Department of Justice and the Federal Communications Commission weigh the pros and cons of T-Mobile’s $26-billion proposed merger with Sprint, T-Mobile continues to update its promises to bolster its chances for government approval.

In the latest update, T-Mobile has pledged to keep supporting Sprint’s low-income Assurance Wireless brand “indefinitely,” USA TODAY has learned. 

Assurance along with Sprint’s other prepaid brands, Boost Mobile and Virgin Wireless, and T-Mobile’s Metro are