Why does my iPhone 6 go to "missed call/voicemail" after only 1 ring?

[iMore Question]

It is NOT set on "Do not Disturb" and is not on "silent". I hear 1 ring and then it is showing missed call. By the time i get it out of my pocket, it is too late to answer the call. I am using an Apple supplied ringtone.

 

[Just_Me_D]

I don't know. You can try the following in an attempt to solve the problem:

1. Reboot your iPhone 6.
2. Reset the 'Network Settings'.
3. Call your wireless provider to see if they can troubleshoot the issue from their end.