I recently got the HTC DNA and have it on ATT. Everything works great, EXCEPT I cannot send/receive MMS. I have verified all APN settings with ATT support, to no avail. It is running Android 4.4.2, HTC Sense version 5.5, software # 4.09.605.5.

 

Hello. The att APN is the only one in my phone. Under network settings, I have PREFERRED NETWORK set to Global. Then under GSM/UMTS options, this is what I have for the APN:
Name: ATT phone
APN: phone
Proxy 172.26.39.1
Port: not set
username: not set
password: not set
Server: not set
MMSC: http://mmsc.mobile.att.net
MMS Proxy: proxy.mobile.att.net
MMS port: 80
MMS Protocol: WAP 2.0 (although I have tried the WAP 1.2 at that doesn't work either)
MCC: 310
MNC: 410
Authentication type: none
APN type: default,mms,supl,hipri
Bearer: unspecified

These are the ones that ATT support instructed me to enter when I was troubleshooting with them yesterday. thank you for your help!

 

Do you know the other 3 that should be on there? Or a link to where they are? ATT (level 1 & level 2 techs) didn't say anything about there needing to be more.

 

I added that as a new APN, saved, & rebooted. Still cannot send/receive.

 

Yes, I have contacted them already. Everything (according to them) on their end is okay. My SIM is compatible, and my account is set up properly. Yes, this is a BYOD because the HTC DNA was originally put out by Verizon, but came factory unlocked.

 

I did enable the PTA, rebooted, and then NOTHING worked, so I had to put it back to my original APN. The *#*#4636#*#* does not work on this phone. It was one of the first things we tried. Odd thing is, If i install GoSMS, I can send/receive the MMS.