Same problem and phone for 6 months. Have to power off and back on every 2 days. Have missed work when alarm doesn't ring. The phone works fine otherwise. Am so tired of this problem.
I am having this problem as well. Missing calls since I don't hear it ring. Had a Zedge ringtone, but have now uninstalled Zedge and the ringtones. Still won't ring. All settings are correct.
We don't want you to be missing important phone calls and we are here to help. We'd like to ask a few questions to better assist. When did this issue start? Have you tried restarting your device?