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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?

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  • i followed the steps on this youtube video... it worked for me after trying many alternatives.....hope it works for u guys as well.........youtube.com/watch?v=E_Cy0oyN1Pg
    – user188655
    Commented Sep 21, 2016 at 14:11

3 Answers 3

Reset to default
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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

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    Last night I installed cm13 ROM and had the same problem And I read the above about deleting APN which works fine thanks a lot #copa07 you saved my time thank you so much.. Hats off...
    – user186952
    Commented Sep 10, 2016 at 5:01
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    @Siije you are very welcome, thanks a lot for the feedback (don't forget to vote, will help others to see it)
    – oo_dev
    Commented Sep 11, 2016 at 7:18
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My phone is LG G3 (D855) with xosp 6.0.1 (Based on cyanogenmod) I fix it -Go to google play store - Type apn - Download apn settings - Download Link2Sd - Run link2sd - Choose APN Settings - Make system app. - Reset phone - Run APN Settings and get your settings - Reset phone. I hope that helps... Sorry for bad English :))

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Well it happens to be APN problem, I contacted my network provider and did apn reset and everything works fine.

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