Now that AT&T updated its policy to allow people unlock their out-of- contract iPhones, T-Mobile took the time to issued a statement inviting AT&T’s customers who unlock their iPhone and join their more than one million iPhone subscribers they currently have. T-Mobile sells microSIM cards that perfectly fit on iPhone 4 and 4S. This is T-Mobile’s official statement:

Today we have more than one million unlocked iPhones running on our network. T-Mobile currently offers microSIMs for customers who already have a GSM phone they want to use on the T-Mobile network, including an iPhone. In order to set up an unlocked iPhone on T-Mobile’s network, customers simply need to purchase a microSIM card and select a T-Mobile Value plan that suits their needs.

T-Mobile’s Value plans enable customers who bring their own smartphone, such as the iPhone, to save money. For example, T-Mobile’s Value family plan with unlimited talk, unlimited text and unlimited data with 2 GB of high-speed data is just $49.99 per line for two lines.

In addition, we will continue to deliver more value to customers as we expand and modernize our 4G network. Beginning this year, we will introduce HSPA+ service in our 1900 MHz PCS spectrum. When we do, our 4G network will be compatible with a broader range of devices, including the iPhone.

Right now in most states, when using an unlocked iPhone with T-Mobile, the iPhone only receives EDGE data — which is equivalent to 2G speeds. But as T-Mobile stated, the iPhone will be soon compatible with their HSPA+ network allowing the iPhone to receive 4G speeds from T-Mobile.