Turning on cellular data despite no data plan, in order to receive MMS messages


    I have a legacy pay-as-you-go plan. Since I have no data plan, I have cellular data turned off on my phone. Someone tried to send me texts from their e-mail account the other day. Because that uses MMS, which doesn't work if cellular data is turned off, I wasn't receiving the messages. So I turned cellular data on, and the texts came through. My question is, how am I charged for that data use? Is it billed like any other text message? If I keep cellular data on at all times (so I can always get MMS messages), what will I be charged for on my pay-as-you-go plan?

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