Comment Comment by pigubrco From https://support.apple.com/en-us/HT207006 (at the bottom of the help article) - "If Wi-Fi is unavailable, iMessages will be sent over cellular data. Cellular data rates might apply." So I'm not sure if it is free over mobile data.On the other hand, I believe AT&T zero rates their RCS messages if you have an unlimited texting plan. (e.g. https://www.att.com/shop/wireless/features/advanced-messagin... > FAQ > how much does advanced messaging cost). Could not find details on TMobile except this article: https://newsroom.t-mobile.com/news-and-blogs/rcs-messaging-l... parent pigubrco 8 years ago
On the other hand, I believe AT&T zero rates their RCS messages if you have an unlimited texting plan. (e.g. https://www.att.com/shop/wireless/features/advanced-messagin... > FAQ > how much does advanced messaging cost). Could not find details on TMobile except this article: https://newsroom.t-mobile.com/news-and-blogs/rcs-messaging-l...