https://www.ispreview.co.uk/index.p...nlimited-mobile-data-plans-compared-2022.html
MMS (picture) messages 65p
One final point to make is that some unlimited data packages DO NOT include the cost of sending MMS (picture) messages, which are – somewhat bizarrely in this modern digital age – still ridiculously expensive (e.g. 65p on Three UK). The annoying part is that many operators still don’t make this clear when you sign-up, thus you might only find out once you get hit by it. So the general rule is, don’t send pictures via MMS – internet messaging services are much better for this.
MMS (picture) messages 65p