Help/Support Can't see pictures sent to me iOS 10.2.1

[FaithfulFires 1.3k iPhone SE 10.3.1]

Plug your phone into iTunes and click update.

I don't need an update I'm at the highest version

[CTRL ALT DEFEET 59 8 10.2]

Going back to the APN settings, try and make sure the information below matches what you have and if not, update it to this:

1. Go to Settings -> General -> Network
2. Under “Network” settings select “Cellular Data Network”
3. Now add the APN Settings given below:
   • Cellular data:ATT
   • APN:wap.cingular or phone
   • Username:blank
   • Password:blank
4. Leave Username and Password blank
5. Done

AT&T 4G MMS Settings for iPhone and iPod

1. Go to Settings -> General -> Network
2. Under “Network” settings select “Cellular Data Network”
3. Now choose the MMS Settings and enter the below given settings.
   • Cellular data:ATT
   • MMS APN:wap.cingular or phone
   • Username:blank
   • Password:blank
   • MMSC:http://mmsc.cingular.com
   • MMS Proxy:wireless.cingular.com:80
   • MMS Max Message Size:1048576
   • MMA UA Proof URL:blank
4. Done

I don't need an update I'm at the highest version

 

Yes I understand that, however when you click Update, it will also check to see if there is a carrier update because your APN settings are missing.  If you didn't try it, then there's no sense in me helping any further.

[CTRL ALT DEFEET 59 8 10.2]

Glad to see it worked.