Does receiving iMessages on iPhones when not connected to Wi-Fi cost?

I know you can only send iMessages when connected to Wi-Fi. But what about when my friend sends me a iMessage when I'm out and about and not connected to Wi-Fi? Will this cost me in mobile data use? Or can they only send me a normal text when I'm out of Wi-Fi range?

It does charge you, I has to pay a pretty big bill because if that. Go into your setting and change it so imessanger only works on Wi-Fi and not on cellular

I'm pretty sure it won't be your data usage, but it counts as a text message. So it kinda depends on your plan. You have unlimited texting, then no charge. If your pay for messages, it's counts as one.

Yups, it will definitely cost u with the packet data usage. As iMessages is a facility that can be availed with internet access only. So you can ask your friends to text u with carrier charges instead when not in wi-fi range. That will not cost u at all.

You CAN send/receive iMessages when you're not on Wi-Fi as long as you're connected to another form of Internet (3G, 4G, LTE, etc). The most commonly used phone service providers like AT&T and Verizon bill you monthly based on a pre-determined data cap or lack thereof. Should you go over that data cap in one month, you will be charged extra.

For example, I have AT&T and am charged $15 for 200 megabytes of data per month. On Wi-Fi, no data goes toward my cap. While on 3G or 4G, data DOES go toward my cap. If I go over that 200Mb cap, I'll be charged an additional $15 for another 200Mb.

You shouldn't be worried about going over your cap just because of iMessages sent/received while not on Wi-Fi. Texts are relatively simple things and don't use much data. Things like Facebook and YouTube while not on Wi-Fi is what will get you.

Hope this helped.