Why does adding a photo change the message type?

Attaching a photo, video, or file through Gallery forces the conversation into MMS mode. Plain SMS cannot carry media, so the app switches formats automatically once you tap Gallery and select a file.

Can I send a text to more than one contact at once?

Yes. Tap Add conversation, then Add, and select multiple contacts before tapping Done. This creates a group message, which may also be sent as MMS depending on your carrier settings.

What can I do if an MMS with a photo keeps failing?

Confirm mobile data is turned on, since some carriers require data even on Wi-Fi to deliver MMS. If the problem continues, check that the file size does not exceed your carrier's MMS limit.

Samsung

Samsung: Send SMS and MMS Messages

Your text keeps splitting into multiple parts or a photo won't attach when you try to send a quick message on your Samsung phone. Both issues come down to how the Messages app switches between SMS and MMS depending on content and length. Knowing which mode is active helps you avoid extra charges and failed sends.

Updated: 07.08.20266 min8 steps

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Samsung

Send a Text Message (SMS/MMS) auf Samsung

Samsung Messages sends plain text as SMS, capped at 160 characters per segment. Longer texts still arrive as one message on the recipient's screen, but they are transmitted as several linked SMS parts, which can affect cost depending on your plan.

Adding a photo, video, or long attachment automatically switches the conversation to MMS. This is why a message that sent fine as plain text suddenly needs a data or MMS connection once you attach media.

To write and send a message, tap Messages then choose an existing conversation or tap Add conversation. Tap Add, select a Contact, and confirm with Done. Enter your text in the message field.

To attach a photo or video, tap Gallery, select the file, then tap Send. The app converts the message to MMS the moment you add media, so make sure mobile data or Wi-Fi is active if MMS over Wi-Fi is not supported by your carrier.

If a message repeatedly fails to send, check your signal, confirm the recipient's number is entered correctly, and verify that MMS settings are configured for your carrier.

Frequently asked questions

Samsung Messages splits any text over 160 characters into linked SMS segments. Your carrier may bill each segment separately, even though the recipient sees one continuous message.

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Android 11 · One UI 3

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Calls & Messages

Samsung: Send SMS and MMS Messages

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