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Add Android T-mobile fix

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TC1977 2019-05-18 10:56:39 -04:00 • committed by GitHub
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docs/troubleshooting.md
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@ -413,7 +413,7 @@ sed -i -e 's/#*.dos_protection = yes/dos_protection = no/' /etc/strongswan.d/cha
Certain cloud providers (like AWS Lightsail) don't assign an IPv6 address to your server, but certain cellular carriers (e.g. T-Mobile in the United States, [EE](https://community.ee.co.uk/t5/4G-and-mobile-data/IPv4-VPN-Connectivity/td-p/757881) in the United Kingdom) operate an IPv6-only network. This somehow leads to the Wireguard app not being able to make a connection when transitioning to cell service. Go to the Wireguard app on the device when you're having problems with cell connectivity and select "Export log file" or similar option. If you see a long string of error messages like "`Failed to send data packet write udp6 [::]:49727->[2607:7700:0:2a:0:1:354:40ae]:51820: sendto: no route to host` then you might be having this problem.
Manually disconnecting and then reconnecting should restore your connection. To solve this, you need to either "force IPv4 connection" if available on your phone, or install an IPv4 APN, which might be available from your carrier tech support. T-mobile's is available [here under "iOS IPv4/IPv6 fix"](https://www.reddit.com/r/tmobile/wiki/index).
Manually disconnecting and then reconnecting should restore your connection. To solve this, you need to either "force IPv4 connection" if available on your phone, or install an IPv4 APN, which might be available from your carrier tech support. T-mobile's is available [for iOS here under "iOS IPv4/IPv6 fix"](https://www.reddit.com/r/tmobile/wiki/index), and [here is a walkthrough for Android phones](https://www.myopenrouter.com/article/vpn-connections-not-working-t-mobile-heres-how-fix).
### "Error 809" or IKE_AUTH requests that never make it to the server