This iPhone patch adds support for the T-Mobile T-Zones package in the USA. You can purchase this package for $5.99 from T-Mobile and use it as your data plan. With this patch, your EDGE will run almost as fast as regular $19.99 data plan but some apps may not work over the EDGE such as instant messengers and IRC. This patch adds the proxy information to your settings file. You may need to configure wap.voicestream.com as your APN in EDGE settings. This is *not* a way to steal TZones internet for free.