moicrophone not working

hi. i am using iphone 6s+ and I have an issue about its microphone. its not working when I tried to call someone who is an android user on any meta apps such as messenger, instagram, telegram. But when I tried calling someone who is using an iphone or any apple gadgets, the microphone works. I also tried to call someone thru their simcard number, the microphone works. the only issue is the microphone is not working on any meta apps when I tried calling someone who is using an android. I tried everything. I restart the phone, I enabled the microphones of each applications but it still doesn't work. what should I do? I hope you can help me.