Or you can also use Terminal Emulator
which of course requires root.
Download Terminal Emulator from Playstore. Install and launch. Type "su" (without the quotes) then press enter key in you keypad then copy paste the following commands then press enter key again to execute
iptables -t filter -F FORWARD
iptables -t nat -F POSTROUTING
iptables -t filter -I FORWARD -j ACCEPT
iptables -t nat -I POSTROUTING -j MASQUERADE
ip rule add from 192.168.43.0/24 lookup 61
ip route add default dev tun0 scope link table 61
ip route add 192.168.43.0/24 dev wlan0 scope link table 61
ip route add broadcast 255.255.255.255 dev wlan0 scope link table 61