Introduced earlier this month, iOS 7.1 appears to be causing issues with personal hotspots for quite a few iPhone users around the world. Following the update, some users appear to be unable to save APN settings for personal hotspots, which have vanished following the update from iOS 7.0.6 to iOS 7.1. While information can be entered into the APN fields of the Cellular Data Settings menu, the values do not save, and attempting to establish a tethered connection results in an error message. Apple's Support Communities currently features a 15-page thread on the issue that was started shortly after iOS 7.1 was released, with many users reporting the same problems with tethering.
