I configured apache2 + php7 on Rpi Zero W, and I can access to the webserver using my PC by enter ip address of Rpi - but if I try to do that from mobile it fails...
Raspberry and phones are connected to the same WiFi network (router1), and PC is connected by cable (to router1). Every devices are on same network, same subnet etc... Tested on Firefox Mobile and Chrome Mobile.
Rpi - 192.168.1.252 PC: 192.168.1.106 Mob1: 192.168.1.104 Mob2: 192.168.1.105
I can ping: PC -> Mob1, PC -> Mob2, Mob1 -> PC, Mob2 -> PC
I can not ping: Mob1 -> Mob2, Mob2 -> Mob1