How do you get MMS to work on iPhone7 with H2O Wireless

I've messaged H2O and they pointed me to their Terms and Conditions. It basically states the MMS works and exists, but not for iPhones. Specifically, it states: "Note: iPhone devices cannot be used on the network for picture messaging or FaceTime at this time."

Initially, since I had actually tried to ask them about multi-recipient messages, I was wondering what pictures had to do with it. But then I discovered that such messages apparently make use of the MMS system. So I guess I'm out of luck unless I change providers to Cricket or something. (And I checked around - Cricket does support MMS on iPhones. I have a couple of co-workers who use them.)

I don't see that option either on my 7 (iOS 10.2.1) and I suspect that their instructions have not been updated.

Try this:

If you can't send or receive messages on your iPhone, iPad, or iPod touch - Apple Support

AG2017 wrote:

I cannot get MMS to work with H2O Wireless using iPhone7. Per the H2O Wireless, I should be able to edit the APN.

https://www.h2owirelessnow.com/mainControl.php?page=dataManualConfig

View and edit your Access Point Name (APN) on your iPhone and iPad - Apple Support

However, I do not see 'Cellular Network' under 'Settings > Cellular > Cellular Data Options'.

Any suggestions on how I can get it to work?

You'll need to work that out with H20 Wireless is a carrier feature, suggest you take it into the store and speak to someone about the issue.