T-Mobile is going to be putting their new prorated ETF (Early Termination Fee) into effect starting on June 30th. A prorated ETF means that for every month of service you complete with your carrier, the amount of the ETF goes down. Most carriers have set it to go down by $5 a month, but T-Mobile has not specified exactly how they will run their ETF policy.

The concept of a prorated ETF exploded into popularity last year, with all four national carriers saying that they would adopt a policy to enact a prorated ETF. AT&T has already announced their policy, and now with T-Mobile announcing their policy, two of the four nationals have set a date for when the changes go into effect.

Just as with AT&T’s policy, there will be a catch. You will have to sign up for new service after the date the policy goes into effect. Meaning if you already have service, then you will not be eligible to get a prorated ETF charge.

[Via TmoNews]