*ISSUE SOLVED - SOLUTION BELOW*
Samsung Galaxy S20+
Android 13
MetroPCS / T-Mobile
I have tried multiple VPN’s (Cyber Ghost, Nord, Kaspersky, Windscribe, Proton, Fine vpn, private vpn) and none of them will connect if I’m using mobile data…
If I connect to Wi-Fi, all of them work with no problem!
I have tried changing what protocols they are using including IPSec/IKEv2 port 500, and every other one and still has no effect.
No matter what none of them will connect if I’m on mobile data. Again if I connect to wifi they all work fine.
The only “vpn” that will connect is the cloudfaire 1.1.1.1 app
*SOLUTION*
The issue seems to be with Android 13 / Mobile carrier using Ipv6 instead of IPv4…
The fix is to change your APN settings to use IPv4.
Here is a simple guide on how to: