Switch back to GDR2 from Black update?

[jslice7]

After downloading the Lumia Black update, I am now unable to send any MMS messages on my 928 on the T-Mobile network.

Is there any way to download the GDR2 update again to replace the Black update?

 

[allos autos]

There's no way to rollback system updates. Once they're done, they're done. What you might try to do is manually add T-Mobile's MMS vpn settings (Settings>Cellular).

NB: You might be able to rollback if you have a developer account or something, but I'm pretty sure it's not straightforward and will likely void your warranty several times over.

 

[jslice7]

Thanks! Manually entering the MMS settings fixed my issue.

 

[Vernon Amos]

Are you able to send and receive as well?. Did you input your MMS settings under cellular or Access Point?.

Thanks

 

[jslice7]

I can send and receive MMS and text messages. Group messaging works fine also.

Couple of notes:
Cellular network must be set to 2G in order to send text messages

MMS settings were manually inputted in cellular settings: APN: fast.t-mobile.com MMSC (URL): http://mms.msg.end.t-mobile.com/mms/wapenc MMSC port: 80 (this popped up automatically for me) Maximum MMS size: 100 (note: originally I set the size to 1, but the photos were super small when sending)

Also, in messaging settings, make sure to click on "MMS delivery confirmation". Without this checked on, sometimes MMS messages show up blank to recipients

 

[Silverdogz]

This might be due to the fact that the 928 is a Verizon phone. Therefore the VZW Lumia Update would come with the VZW MMS settings

 

[Vernon Amos]

Thanks for the info. Finally got MMS working for ptel. I was using Access Point before but wasnt working.