Wifi-Direct multiplayer not working

The wifi direct multiplayer does not work. I have no wifi. I use to play with my brothers until 0.15.0, I keep trying again if it works. never does. I have a samsung galaxy tab 3 lite 7.0''. Can you return it to mcpe or fix it. it shows my own world in friends when connected to wifi at school. Me and my brothers are getting bored of mcpe without use playing together on wifi-direct. If bluetooth one works I cant use bluetooth. Mine bluetooth stopped working. please fix.