Airdrop doesn't work between iphones

I have a IP 6s plus (10.3.2) and iphone 5s (10.3.2). For some reason it does not show my 6s to my 5s at airdrop. Everything works the other way around: 6s sees 5s and it works.

I also tried with other devices and same thing happens. I can send everything from my 6s to everyone but nobody sees my phone.

Does anyone know why is this happening?

Also everything worked fine few months back, but now suddenly not. Is it something to do with updates? I have tried every solution (all the turning on and off and on stuff) here in this group.

Help!