LG G5: Switched carriers and texts no longer can send/receive pics, group texts, or Multi media.

[Android Central Question]

My phone is less than 2 years old. Bought it at an ATT store for $650. It has the ATT logo on the back. I switched carriers. Email and messenger work, but my texts can only send/receive short texts. No long texts, pics, group texts, or any multi media messages work on the "text". ATT say it is no longer their problem. T-Mobile says that's the way it is. My son has an I-phone, and it switched easily.
Help!

 

[SpookDroid]

You need the correct T-Mobile MMS settings. Your son's iPhone didn't just 'switch' if he's just using iMessage (which is an entirely different protocol than SMS/MMS). T-Mobile should be able to help, and I suggest you visit a store rather than trying to get it over the phone (way friendlier that way). I'm sure you can find the settings online, too, but a store rep is always easier.

 

[Rukbat]

The current T-Mobile APN is:

Name: T-Mobile US LTE
APN: fast.t-mobile.com
Proxy: leave blank
Port: leave blank
Username: leave blank
Password: leave blank
Server: leave blank
MMSC: http://mms.msg.eng.t-mobile.com/mms/wapenc
Multimedia message proxy: leave blank
Multimedia message port: leave blank
MCC: 310
MNC: 260
Authentication type: None
APN Type: default,supl,mms
APN protocol: IPv6
APN roaming protocol: IPv4
Mobile virtual network operator type: None
Mobile virtual network operator value: leave blank

(Note: No spaces in the APN Type entry, just commas.)