No mobile data with CM13 I have flashed CM13 onto my Samsung Galaxy S3, and since then, mobile data does not work. I am logged in into the network and I can make calls and receive SMS, so the IMEI / EFS data is still there and working. Connecting to the mobile network works, too, the "mobile data" button is enabled. 

No matter which app I try to use, none of them can connect to the internet with mobile data. I only get error messages. However, resetting the mobile data statistics and then trying again still gives me error messages, but a few kilobytes of data usage appear in the statistics. 

I already tried: 
- Wipe Cache
- Re-flash CM13
- Restart phone a dozen times
- Enable and disable Airplane Mode a dozen times
- Deleting the APN and re-entering the exact information I got from my provider
- Completely disable and uninstall AFWall+
- Disable any "data restriction" / security / privacy settings I could find that could possibly cause this

What else could be the problem? Why does my mobile data not work?
If someone still has no mobile data, delete all APNs except the one you need. That fixed it for me after a lot of time of investigation﻿