I helped someone transfer their data from Android to iOS and something which stood out after the transfer is that MMS cannot be sent without mobile data being turned on, on the latter but it could on Android. I googled it and the answers I got suggested that MMS is not possible without data on period, but this is not the case as the same sim was happily sending MMS messages on the old device with data switched off but not on ios. I also tried it on another person's Android device whilst in the same room - data off, MMS successfully sent.
Is it only iOS that requires data to be on in order to send MMS messages?
Is it only iOS that requires data to be on in order to send MMS messages?