I'm new to all this. Please be patient. When I send a text from my iPhone with the newest operating system and it goes to another iPhone with the new operating system, the text shows in blue as an iMessage. Are we using data from our data plans, if the two phones are connected to the internet? If both phones are away from the internet - and the texts travel over cell towers - are we using data from our plans? Do iPhone to iPhone calls count against minutes when two different carriers are involved.