T-Mobile is extending its "Never Settle" free trial campaign for Verizon customers considering a switch to the un-carrier.

Early last month, T-Mobile fired a salvo at the competition by offering Verizon customers a 14 day trial of the un-carrier's service. The offer was meant to expire on May 31, but T-Mobile has extended it through June 27.

The "Never Settle" campaign allows Verizon customers to port their numbers to T-Mobile with free service for up to 14 days. When the trial is over, T-Mobile will cover Verizon's early termination fees up to $650 for those who wish to decide to go with the un-carrier. If a customer decides T-Mobile isn't for them, the carrier will also refund any fees, including Verizon activation charges.