Two of the nation's biggest discount cellphone carriers are joining forces.
T-Mobile and MetroPCS announced the merger Wednesday. The combined company will be called T-Mobile and will have more than 42 million subscribers.
Neither company on its own could challenge the market's dominant players -- AT&T, Verizon and Sprint. But together, T-Mobile and MetroPCS believe they'll have the resources to be a lower-cost contender.
Customers won't notice a difference for a while. The two companies' networks aren't compatible, so a new one will be put in place. MetroPCS will migrate its customers to the new network, a process company executives said won't be done until the end of 2015.