I've a Galaxy Note 4 (udpated to latest OTA) device and I'm trying to setup a reliable wifi/vpn connection to my dormitory network. The procedure to connect to internet is to connect the wi-fi network and then enable a PPTP vpn.
It connect to wi-fi network, then I see a notification which says "Sign into Wifi Network". I enable the vpn and I get connected but after a few minutes it get disconnected (bcz the wi-fi get disconnected).
I've tried to turn on/off smart switch, power saving mode and different developer options but nothing has changed. I also tried 3 other router in the dormitory and nothing has changed. I've an old android 4.0 phone (Sony WT910) which is able to connect to the network and provide reliable connection, there are other android phone (such as Galaxy Note 5) which have no such problems. Also, the problem is with this particular vpn enabled network and I can connect to other wi-fi network such as my home wi-fi which doesn't require the user to sign-in through vpn and directly connects to the internet.
I suspect that the problem is with that "Sign into Wi-Fi network" which tries to open up my browser as well for a url. I can connect and enable the VPN but since the wi-fi get disconnected after a while I don't have reliable connection (I have to re sign-in each couple of minutes). It seems that there is a stupid mechanism (I'm not sure) in the software which thinks that the wi-fi can't access the internet (bcz of no sign-in) and hence disconnects the wi-fi. This is independent of vpn, with/without enabling the vpn, the wifi get disconnected.
- Galaxy Note 4 (SM-N910C)
- Android Version: 6.0.1
- Android security patch level: April 1, 2017
- Kernel Version: 3.10.9-9197253
p.s. I've tried lolipop DHCP (legacy) as well but nothing has changed
here are exactly the same problem:
This seems a Bug/Capability which check the connectivity of a WiFi connection using client3.google.com (Spying?) and when see it is not connected (in most cases sign-in required and you should enable a vpn) the android decide to drop the WiFi!