Lately I've been having problems with my Maxx2 not ringing or even registerng that I missed a call. I found this out whenI started getting text messages asking why was I sending calls to voicemail. This problem goes away after rebootig phone but soon returns after a few hours or days. Verizon tech support already had me do a factory reset. Is anyone else having this problem? Verizon is treating this as a non-issue.