Unable to reply whatsapp messages from gear s3

I always see a drop in signal of Airtel 4g in my galaxy s8 . So times I get error message that you are not registered on the network. Is it a network problem or phone problem. Do I need to do something here, to have a better signal reception.Facing l...

Is there any limit fixed by RBI on NFC payments? Or samsung pay? Because in my recent transaction, I was facing that error, you amount is more than the prescribed limit by RBI

What are the different gestures available in galaxy s8, like any double tap to wake up. Does galaxy s8 have the air gestures as well?