It's imperative your device is running in top form! What happens when you attempt or receive a call? How long has this issue been occurring?
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Most times i do not receive the calls. Sometimes it goes to voicemail or does not ring at all. This issue had been going on for a year since I had phone. I had been in touch with verizo at least 3x about this issue.
Sent from my Verizon Wireless 4G LTE smartphone
I have the same problem and I live in Nebraska. Mine is sporadic but quite confusing and frustrating when it happens. The calls do not even show up as missed calls yet I have voice mails.