Who I have the same questioned this topic

Sporadically, my calls will go immediately to voicemail.  It has happened the last two days.  My phone doesn't even ring.  Yesterday I shut my phone down and started back up and it started working properly again.  This morning it is not working again.  I can text and make outgoing calls myself but incoming aren't working.  I use this phone for work and need to be able to receive my calls in a timely manner and not have them go to voicemail immediately.  Please help.  I have also checked all my settings and they are correct to receive calls.