Receive MMS on a low data plan?
I'm currently making the jump from Android to iOS, and one of the issues I've bumped into is receiving MMS on low-data plans. I understand the MMS requires cellular data. I only get 250MB/month, which is fine for my needs. On Android, if you receive an MMS without data turned on, you simply get a notification that an MMS is waiting. You can then flip cellular data on, download the message, then turn data back off.
It looks like iOS does not do anything like that? Obviously I don't have enough data to just leave it on all the time. Does anyone have suggestions on how to receive MMS on cell plans with low monthly data?
iPhone 6, iOS 9.2, Ptel $20 plan