For the last two weeks my AT&T S4 I337 running safestrap rooted 4.4.2 has started losing complete network connectivity but not giving any indication. Usually it shows 4G LTE with only one bar, but it also locks up with more bars. I can't make or receive a call or text and data doesn't work. Toggling airplane mode on/off restores the network connection. This is happening multiple times per day in two different cities. Anybody have any ideas for troubleshooting this? Did anybody else start having problems around the same time? I have a Titanium Backup from 6 weeks ago, but I'd rather not restore everything until I'm out of other options.