Cellular Connection and MMS issue
- /e/ version: 0.17-o-20210531117530-stable-starlte
- Device model(s): Refurbished Galaxy S9 SM-G960F
- Device rooted: Purchased from eFoundation
Summary
Small x displayed at bottom of cellular signal icon (no connection). Resolved by correcting T-Mobile APN settings, but MMS is not working.
The problem
Steps to reproduce
What is the current behavior?
Using SIM card for T-Mobile US LTE network, a small 'x' was displayed at the bottom of the signal bars icon (no connection). I resolved the connection issue by editing the T-Mobile APN to match settings shown on T-Mobile's web site. (APN Type and APN Protocol did not match.)
Remaining problem is MMS does not work.
What is the expected correct behavior?
Technical informations
Relevant logs (adb logcat
)
Relevant screenshots
Solutions
Workaround
To resolve the no connection issue, I changed two APN settings to match values provided by T-Mobile.
Settings included with eFoundation phone - APN type: default,supl,mms,ia --- APN protocol: IPv6
Settings specified by T-Mobile - APN type: default,supl,mms --- APN protocol: IPv4/IPv6
After changing APN Type and APN Protocol to match T-Mobile's documentation, the network connection is now working. However, MMS does not work.
Possible fixes
The remaining issue, unable to send or receive MMS, is likely due to a setting that is missing in the APN provided with the phone. T-Mobile's settings include MMS protocol: WAP 2.0. However, MMS Protocol is not included in the APN on the eFoundation phone, and I don't see a way to add it.