I have a close friend living in Qatar that I lost contact with several months ago, when many VOIP services (such as Whatsapp) stopped working there. I have tried calling many times; they have answered twice (so I know this is still their phone and they are answering my calls when they go through) but could not hear anything I said. I have already gone through troubleshooting with my phone carrier (AT&T) and they were no help. After experimenting some more, I found that I cannot call ANY mobile device in Qatar, but landlines do pick up. I understand that the primary issue at this point may be with the service providers in Qatar; I have reached out to them but received no response. I have tried everything I can to improve my connection and am certain my connection is good. Because I cannot get in contact with my friend, I have no idea what methods they have tried. I would appreciate any information or tips anyone can give me!
I have done some research and, indeed, there seems to be an issue with VoIP services in Qatar. Regular cell phone calls should be working however. I understand you’ve made sure your connection is good, but how about, just for a test, trying to place the call to your friend’s mobile using a different US carrier? Also, have you tried messaging each other via mobile?