I have heard from a number of readers recently that they have seen the Carrier name in their iPhone’s status bar change from HOME to TFW. This appears to be part of a new carrier update that has been released. I installed the carrier update on my iPhone 5 running iOS 7.0.2 and you can see that updating my Carrier changed from AT&T 15.0 to TFW 15.6.
Both my data and MMS continued working after I installed the update. There is also a iOS update 7.0.3 currently available. If you updated to iOS 7.0.3 you may have automatically received this TFW 15.6 update.
So the change to from HOME to TFW is ok. By the way, TFW stands for Tracfone Wireless. Straight Talk, Net10 and Tracfone are all owned by the same parent company.