Weird noise when answering via speakerphone

[nestman]

Okay, after several years I am back again trying to resolve this issue. I followed the directions that were suggested by Travis_Yealink:

export the configuration file-->reset the phone to factory-->import the configuration file

But now when I try to dial out the calls is not going through. Ugh. I thought backing up the config file was supposed to retain all my settings? What went wrong? I use these Yealink phones with a Grandstream IP/PBX.