Twice in the past two months I've lost my signal. Both times phone was randomly rebooting and i had no signal, not 4g or 3g. First time ended up doing a factory reset to get it back. This time used House of Bionic and did a fxz but kept data. Nothing else would get 4g back. This time i did find out that if i went into airport mode, turned on wifi or bluetooth it would get 3g signal after exiting these modes. It would keep 3g but never get 4g. Weirdness, anyone else gave anything like this happen before?