why does my Nexus 5 go direcctly to voicemail instead of ringing ?

[AC Question]

When I try to call some one , the line goes dead (does not ring) and then beeps as though I have been transferred to voicemail.

When some one calls me , it does not ring and goes directly to voicemail.

 

[itguyjax8430]

When I try to call some one , the line goes dead (does not ring) and then beeps as though I have been transferred to voicemail.

When some one calls me , it does not ring and goes directly to voicemail.

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How is the signal? Does it disappear when you try to make a call?