NexusOS 9.0 (LineageOS for Galaxy S6 T-Mobile)

MMS sending hangs Messenger

MMS receiving downloads forever

  • 1
    Verify you have the most up to date APN with T-mobile customer service. – Bo Lawson Jan 22 '19 at 0:00
  • @BoLawson that was the problem, it was just an APN setting wrong, I checked in the docs – Jonathan Jan 22 '19 at 0:26

I had to go to

Settings > Network > APN > Hold finger down on current APN setting

and change APN Protocol from IPv6 to IPv4/IPv6 per T-Mobiles APN Docs

NB: I also downloaded the T-Mobile and T-Mobile Visual Voicemail app and switched from LineageOS messenger app to Textra, but I doubt those steps were relevant.

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