Posts Tagged ‘T-Mobile’

Fix for T-Mobile MMS not working with Wifi [Calling] connected. (Group and Picture texts)

I like to buy my own phones and bring them to my plan. Sometimes this results in not having the full config to make the phone work 100% on a carrier. I recently fixed issues where I could not receive MMS messages if I had an active wifi connection. When my phone is on wifi, […]

T-Mobile Wifi Calling – ER081 Firewall Port Summary

Open the following ports on your firewall: TCP 5060-5061 UDP 4500 (aka IKE Traversal)  –  Note: This is the port the call data goes through Additionally, you may need to let IKE Key Exchange traffic through. UDP 500 Other errors: REG99 – Go to my.t-mobile.com and update your E911 address (even if you previously have)