T-Mobile messaging with multiple recipients on W10M

[MBY]

Hi,
I haven't been able to send MMS to multiple recipients for quite some time on my L640 on W10M Insiders' with T-Mobile. It always says that it couldn't send. I can send to individual people just fine. Has anyone else had this problem?
Thanks.

 

[Joe_N]

Try fixing the mms APN settings.

MMS APN -
Change APN field to fast.t-mobile.com
Change MMSC (URL) to mms.msg.eng.t-mobile.com/mms/wapenc

I recently had the exact problem and this seemed to fix it. Several people recommended turning off international assist as well.

 

[MBY]

Thanks. I tried your settings (with the ones at T-Mobile APN MMS Settings For Windows Phone, Nokia Lumia to fill in the blanks) but I'm still not able to send MMS.

 

[fatclue_98]

I had a wonky MMS event last night, I couldn't send MMS on my L1520. After editing the MMS APN settings over and over I ended up deleting them altogether and just kept the default data APN. After a reboot, all was well.

 

[MBY]

I tried both removing those APNs and just using default (which I had before), and re-adding the APNs. Neither one actually worked.
MMS APN settings I used:
APN: fast.t-mobile.com
user name & pass: blank
type of sign-in info: none
IP Type: IPv4 (I also tried IPv6 and the default IPv4v6)
Proxy server: blank
Proxy port: blank
MMSC (URL): http://mms.msg.eng.t-mobile.com/mms/wapenc
MMSC port: blank
Maximum MMS size: 1024

 

[IFLYME]

Go to settings, system, messaging then select your T-Mobile Sim under the SIM section. Make sure the MMS Group Text is selected on.

 

[MBY]

Go to settings, system, messaging then select your T-Mobile Sim under the SIM section. Make sure the MMS Group Text is selected on.

Thanks, but that's been set up that way all along.

 

[dorelse]

Yep, I followed you fatclue_98, I had it working by adding in 600 for max size on my phone, but also just went back to default like you pictured...both worked for me.

 

[MBY]

Tried to set this up again after a hard reset. Still no MMS working.

 

[venious]

Mine doesn't work either, so you aren't alone. I'm not going to say that Win10 release Preview has been a productivity time machine back to the past, but I guess I just did.

 

[Player Piano]

I've never had a problem with group messaging with T-Mo. I think entering the APN correctly is the key.

 

[venious]

The fix was fast.t-mobile.com & http://mms.msg.eng.t-mobile.com/mms/wapenc , however after saving you need to take the phone into airplane mode and then back out to re-auth with the cellular network.

 

[Player Piano]

I remember reading somewhere that to get the settings to stick you should send yourself a photo after you enter the APNs. I don't know if this is true but that is what I always do and haven't had MMS problems.

 

[MBY]

You know, none of that worked. What did work was turning off stupid Wi-Fi calling! I realized it may have been related to this when I was able to send MMS when I was not at home. I'd been keeping Wi-Fi calling on "WiFi preferred" in hopes that WiFi calling would actually work - it hasn't - because my cell reception at home is not good. But it turns out that has done more harm than good!

 

[Player Piano]

Nice catch. I have heard of this issue, but I have never used a T-Mobile branded WP.

 

[PGrey]

You know, none of that worked. What did work was turning off stupid Wi-Fi calling! I realized it may have been related to this when I was able to send MMS when I was not at home. I'd been keeping Wi-Fi calling on "WiFi preferred" in hopes that WiFi calling would actually work - it hasn't - because my cell reception at home is not good. But it turns out that has done more harm than good!

This probably keeping your phone from (briefly) disabling WiFi to send the text. We have two older phones in the household that you have to be careful with (an HTC M8 and a 1020), if you leave WiFi on, and send a MMS text (attachment or group), it gets into a weird loop, where MMS cell data is shut down completely.
I can usually get the phone to reset the cell data for MMS by going in/out of airplane on these phones, sometimes several times each (the M8 is easier than the 1020), and also by sending the respective account a MMS text to itself (usually just a pic).
It's a pain, but the ONLY issue that the 1020 has had; the M8 has hung a couple of times. Both run fine, other than this oddity, but I think this is more of a general OS issue that will get fixed, eventually...
We saw this MUCH more frequently on T-Mobile, but occasionally on AT&T now too. I think this is due to net congestion on T-Mobile, but that's just a guess, it gets into a similar loop where it thinks MMS data isn't working, and the OS goes sideways...