12-20-2017 8:46 PM
I recently switched from Verizon to AT&T for wireless services. I elected to keep my Samsung Galaxy S6; Verizon doesn't lock it's smartphones, so that wasn't a problem.
The native texting app on my phone is Verizon's proprietary app so, of course, it doesn't work on the AT&T network.
I have tried a couple of different texting apps, currently using Textra, but I am not able to send or receive MMS messages.
Is there a setting that I can change, or should I take my phone to the AT&T store for assistance?
Thank you for your help.
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12-20-2017 9:15 PM
Not really. Verizon branded Android devices usually never work with MMS on the AT&T network. It's because of the way they integrate Messsages+ into the ROM.
12-21-2017 6:28 AM
Using a 3rd party app should work and it’s the solution others used successfully with the galaxy line of phones.
12-24-2017 12:39 PM
Thank you for your response. It looks like I might be out of luck, because none of the third party apps I have tried will send or receive MMS messages.
12-24-2017 12:47 PM
Verizon using CDMA tech vs ATT using GSM is your issue. Even unlocked the the doesn't mesh together. MMS always uses carriers signal even if you're on wifi. If the Verizon phone can't utilize the technology or frequency bands, it will never work despite anything anyone says.
04-21-2018 1:55 PM
I had a similar problem, and an (otherwise very good) at&t employee at a store concluded Verizon is probably including firmware to prevent some functionality. But I discovered a solution which works for me (Verizon S7 G930V).
In the end, I can use MMS and get 4G LTE service (at least the symbol appears in the status bar).
Input into your phone's Access Point Names the following information from this post:
Name - PTA
APN - pta
Proxy - Leave Blank
Port - Leave Blank
Username - Leave Blank
Password - Leave Blank
Server - Leave Blank
MMSC - http://mmsc.mobile.att.net
MMS Proxy - proxy.mobile.att.net
MMS Port - 80
MCC - 310
MNC - 410
Authentication Type - Leave Blank
APN type - default,mms,supl,hipri
Bearer - Leave Blank
08-16-2018 10:50 AM
I had the same problem with Samsung Messages app (unable to send images via text or very slowly downloading incoming text messages with images), switching a Galaxy 6S Verizon to the AT&T network. I finally downloaded the Google Messenger app on the Samsung 6S and it seems to work now.