How do I leave an mms group test or msm group text. (A group with people who have other devices than iPhone)?

Hi there Bentleythe,

Per Leave a group text message thread on your iPhone or iPad:

To leave a group text, everyone needs to be using iMessage, which is an Apple feature.

Since you can't leave a group text message if any members are not using iMessage, you can mute the conversation using these steps from that same article:

How to mute a group text message

1. Tap the group text message.

2. Tap the group icons at the top of the thread. If you're on iOS 14 or earlier, tap the group icons at the top, then tap the Info button .

3. Scroll down, then turn on Hide Alerts.

Or, from your list of messages conversations, you can swipe left over the group text message and tap the Alerts button . With iOS 15, When Hide Alerts is on, the Hide Alerts icon  appears next to the conversation on the right side. With iOS 14 or earlier, a crescent moon icon  will appear next to the conversation.

Hide Alerts stops notifications for a specific group text message, but not for all the messages on your device. You'll still receive all other messages and notifications. Learn more about managing your notifications.

If this is something you'd like to see changed in the future, then we would encourage you to submit your feedback about this here: Feedback - iPhone - Apple

Take care!