why does iphone ring once and go to voicemail?

[Android Central Question]

phone rings once and goes to voicemail

 

[mustang7757]

If you have iphone try going to our other forum for iphone here
https://forums.imore.com/

 

[mustang7757]

If something different can register here

I'll leave a Link to register so you can communicate here as a guest account you can only post questions but can't reply
https://forums.androidcentral.com/showthread.php?t=409154

 

[B. Diddy]

Welcome to Android Central! If this is an Android phone and not actually an iPhone, then tell us which phone it is, and which carrier you have.

Are these calls from people in your Contacts, or are they spam calls?