This is for anyone who's receiving slower data speeds on T-Mobile after the carrier update. I'm just letting you guys know if it's what happened to you, this is a fix. If anyone tries this, would you kindly let me know if it works? I'm planning on getting a T-Mobile iPhone 5 soon.
http://9to5mac.com/2013/05/11/hacke...ate-file-to-amplify-iphone-5-cellular-speeds/
http://9to5mac.com/2013/05/11/hacke...ate-file-to-amplify-iphone-5-cellular-speeds/