why does an incoming call knock off my existing call

[Android Central Question]

When I am on the phone an incoming call knocks off my existing call.

 

[mustang7757]

Which phone?

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! Also, which carrier? This is probably more of a carrier issue, so it may be worth contacting them.