How do I set up mms messaging? [Lumia 635]

[Windows Central Question]

I'm having trouble sending picture messaging on my Nokia Lumia 635

 

[RumoredNow]

Do a web search for "<carrier name> MMS settings"

On the phone, go to Settings > cellular +SIM > SIM settings > edit MMS APN and make sure the values match the ones you found from the above web search.