Bypass T-Mobile Hotspot Tethering Limit by using the phone's unlimited plan? I have the 10gb hotspot plan for tmobile but I also have unlimited data when I'm on my phone. Is there a way to bypass the hotspot limit by using the unlimited data from my phone instead? I have the nexus 6 on android version 6.
You could make your phone to act as a VPN Gateway

Requirements:


root
vpn server (can obtain any free openVPN from playstore)


Using a VPN gateway will make tethered traffic to go through the VPN.

Steps


Turn on portable hotspot 
Open terminal as root and enter the following codes (you can paste them)

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



Edit

If you are not rooted you can use PdaNet+.