How To Fix Galaxy S26 Texting Problems (2026)

If your Galaxy S26 will not send or receive texts, the cause is usually the messaging app, RCS, mobile data or the SIM.

Most of these problems are fixable without a reset, and none of them mean the phone is defective.

Work through the steps below in order, starting with the quick checks, which take about a minute each.

Quick answer: which fix matches your symptom

Symptom	Most likely cause	Go to
Nothing sends or arrives, calls also fail	No signal or SIM problem	Steps 1, 2 and 8
Texts fail but calls work	Messaging app or default app	Steps 3 and 4
Picture or group messages fail	Mobile data or MMS settings	Step 5
Not getting texts from iPhone users	Number still registered to iMessage	Step 7
Chats stuck on connecting	RCS verification	Step 6
One contact only	Blocked or badly saved number	Step 9

Why is the Samsung Messages app a problem on the S26?

Samsung says Samsung Messages is no longer supported on Galaxy devices running Android 12 or higher, and that it cannot be downloaded from the Galaxy Store on the Galaxy S26 or newer.

Samsung also says that after July 6, 2026, the app cannot send messages except to emergency numbers or contacts, so Google Messages is the app to use.

If your S26 texting trouble involves RCS errors or a missing Samsung app, read our guide to the Galaxy S26 Samsung Messages removal and RCS errors.

Step 1: Check signal and restart the phone

Weak or missing service is the simplest reason a text will not go through.

1. Look at the signal bars and the 4G or 5G icon at the top of the screen.
2. Open Quick settings, tap the Power icon, then tap Restart.
3. Send a plain text to a friend and wait a minute.

If the screen is frozen, hold the Side key and Volume down key together for more than 7 seconds to force a restart, as Samsung describes in its SIM troubleshooting guide.

Step 2: Toggle Airplane mode

Switching Airplane mode on and off makes the phone register on the mobile network again.

1. Turn Airplane mode on from Quick settings.
2. Wait about 10 seconds.
3. Turn it off and try the text again.

Step 3: Make Google Messages the default app

If two apps compete to handle texts, messages can disappear or fail to send.

1. Open Settings.
2. Tap Apps, then Choose default apps.
3. Tap SMS app and select Google Messages.

Update Google Messages from the Play Store afterward, because Google lists an outdated app among the common causes of sending and receiving errors.

Step 4: Clear the Messages app cache

A corrupted cache can make the app hang on sending, and clearing it does not delete your conversations.

1. Open Settings and tap Apps.
2. Select Messages (or Google Messages).
3. Tap Storage, then Clear cache.
4. Reopen the app and send a test text.

Avoid Clear data unless you have to, since it resets the app’s settings.

Step 5: Fix picture and group messages (MMS)

Picture messages need an active mobile data connection, even when you are on Wi-Fi.

• Mobile data: make sure it is turned on in Settings, then Connections.
• APN settings: Google lists resetting APN settings to default under the phone’s Settings app as an MMS fix.
• Plan limits: confirm your plan or balance covers messaging.

For group threads, open Google Messages, tap your profile picture, then Messages settings, Advanced and Group messaging.

The option to send an MMS reply to all recipients keeps replies in one group thread, while the other option sends individual messages.

Step 6: Reset RCS chats in Google Messages

RCS chats are the modern, internet-based messages, and they need both people in a conversation to have RCS turned on.

1. Open Google Messages and tap your profile picture or initial.
2. Tap Messages settings, then RCS chats.
3. Check the status line under the toggle.

Status shown	What Google says it means	What to do
Connecting	Your number is being verified	Wait
Trouble connecting, awaiting retry	Verification problem	If it lasts over 30 minutes, tap Details, then Submit feedback
Not supported	Often a connection issue	Check your internet connection
Disabled by your carrier	Carrier block	Contact your carrier

Step 7: Deregister iMessage if you switched from an iPhone

A number still registered with iMessage can keep iPhone users’ texts from reaching your Samsung.

If you still have the iPhone with your SIM in it, turn off iMessage and FaceTime in its Settings, under Apps.

If you no longer have the iPhone, use Apple’s online tool at selfsolve.apple.com/deregister-imessage and follow the prompts.

Apple notes that some devices may take a few hours to stop sending you iMessages.

Step 8: Reseat the SIM and reset mobile network settings

These steps address network registration problems that survive a restart.

1. Power off, eject the SIM tray with the eject pin and place the Nano-SIM with the gold contacts facing up.
2. Push the tray fully back in and power on.
3. Still failing? Open Settings, tap General management, tap Reset, then tap Reset mobile network settings.

That reset clears cellular and VPN settings, and the phone disconnects from Wi-Fi networks and Bluetooth devices.

If the SIM is an eSIM that will not activate, see our Galaxy S26 eSIM activation fix.

Step 9: Check blocked numbers and contact formatting

If only one person is affected, the problem is probably on that contact’s side of the setup.

• Blocked: make sure you have not blocked the number.
• Saved wrong: delete the contact and add it again.
• International numbers: add the country code, such as +44 for the UK.

Short codes can also fail with a message that you cannot reply, which happens with outbound-only or premium short codes.

To allow premium SMS, go to Settings, Apps, Special apps access, then Premium SMS, and select the app that asks for access.

Step 10: Update the software and run Samsung diagnostics

A pending update can carry fixes for network and messaging bugs.

1. Open Settings, tap Software update, then Download and install.
2. Open the Samsung Members app, go to Support, then Get Started, and select SIM to run diagnostics.

When to contact your carrier or Samsung

Situation	Who to contact
Calls and data fail too	Your carrier, to check outages and your line
SIM protection blocks a new SIM	Your carrier, who can turn it off
Another SIM works but yours does not	Your carrier, for a replacement SIM
Nothing above helped on a working line	Samsung support, or a service centre

Back up your data before attempting a factory reset, and use it only after every step above has failed.

For more S26 trouble, see Galaxy S26 battery drain problems.

Official references: Samsung Messages discontinuation, Google Messages sending and receiving help and Can’t turn on RCS chats.