The Messages app on your iPhone handles both Apple’s proprietary iMessages (blue bubbles) and standard carrier text messages (green bubbles). A common frustration occurs when you are typing a standard SMS text message to an Android user, and your message suddenly converts into an MMS (Multimedia Messaging Service) message. This usually happens if you attach a photo, type a very long message, or include a subject line. Because many cellular carriers charge extra fees for MMS messages—or restrict them entirely—this automatic conversion can be annoying. You can easily prevent your iPhone from making this switch.
How to Disable MMS Messaging
You can turn off MMS capabilities completely from the main Settings app.
- Open the Settings app on your iPhone.
- Scroll down the main menu and tap on Messages.
- Scroll down to the section titled SMS/MMS.
- Locate the toggle switch labelled MMS Messaging.
- Tap the switch to move it to the Off position (the green background will turn to grey).
What Does This Change Do?
With MMS disabled, your iPhone will forcefully send all non-iMessage texts as standard, plain-text SMS messages.
Important Limitations:
- You will no longer be able to send photos or videos to Android users (you will get a “Not Delivered” error).
- You will not be able to participate in cross-platform group chats (group texts containing both iPhone and Android users rely on MMS architecture to function).
- Extremely long text messages will be broken up and sent as multiple, sequential SMS messages rather than one unified MMS block.
If these limitations are acceptable, turning off MMS is a great way to guarantee you never incur unexpected multimedia messaging fees from your carrier.