Why do my calls keep failing?

When I call on my iPhone 5, I can call anyone, except this one person. If I try on another phone, I get the same result. I can't hear the normal BEEP BEEP you hear when the call is connecting and dialing. All I hear is silence. Then the call just ends without going to voicemail. How do I fix this? This is really urgent.

Probably the person your trying to call didn't have their telephone connected. Or that person may have problems with their telephone interface.

Bad service

You can try calling that person after sometime. It is due to bad service sometime or the person is out of reach. There can be any reason so calling after a while can be a solution.

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