is offering discounts and credits for customers trading up from an iPhone 4 or iPhone 4S to the iPhone 5 through retail stores. The offer, an attempt to encourage upgrades between the iPhone 5's launch on the network on Friday 12th
, removes the $99 upfront cost for the iOS device, as well as providing a credit of up to $120 towards monthly bills.
If the traded-in iPhone 4 or 4S earns the user the full $120 credit, it can be used to pay an existing T-Mobile bill, towards future monthly bills, or purchasing accessories or another device. At its maximum, the $120 credit would be the equivalent of saving $5 per month off the $20 monthly cost for the iPhone 5.
The trade-in offer will continue to be available to customers until Father's Day, on June 16th.