Fix RCS Not Working on iOS 18: Step-by-Step Guide

Problems with Fix RCS Not Working on iOS 18 may be caused by disabled settings, temporary system errors, compatibility conflicts, or corrupted data.

The fixes below begin with simple checks and progress to more advanced troubleshooting so you can restore normal operation without unnecessary changes.

How to Fix RCS Not Working on iOS 18

Turn RCS Back on in Settings

Please check if RCS is enabled on your iPhone, because we may have accidentally turned off RCS without knowing it. Or we can turn it off and wait a while to turn it back on.

Check Carrier Support

Not all carriers support RCS messaging on iPhone, so you'll need to check if your iPhone's SIM or eSIM supports RCS messaging.

Go to Settings , then click on General and scroll down to click on About .

Below in the IMS Status section you check if it shows Voice, SMS and RCS then your carrier supports RCS messaging. If it only shows Voice and SMS then your carrier service on your iPhone does not support RCS messaging .

Check Carrier Support illustration

Update iPhone to New Version

You should install the latest version of iOS 18. The latest version can fix the RCS not working error on iPhone.

Restart iPhone

Restarting your iPhone can resolve some temporary bugs that affect RCS functionality.

Check Network Connection on iPhone

RCS messaging requires a WiFi connection to send and receive messages, so if you have any network connectivity issues, this feature may not work. Turn off WiFi and reconnect, or switch to a different WiFi network. If that doesn't work, turn on Airplane mode on your iPhone and then wait a while and turn it off to use RCS messaging on your iPhone.

Reset Network Settings

Resetting Network Settings on iPhone fixes the problem and restores all settings to their default state. If you can't figure out what's causing the network problem, you can try this method.

Go to Settings , select General , and tap Transfer or reset iPhone .

Reset Network Settings screenshot 2

Now click Reset and select Reset network settings to perform.

Reset Network Settings screenshot 3

FAQ

What commonly causes problems with Fix RCS Not Working on iOS 18?

Common causes include disabled settings, outdated software, temporary system errors, compatibility conflicts, corrupted files, or incorrect configuration.

What should I try first?

Start with the simplest checks, confirm the relevant setting, restart the device or application, and install trusted updates before attempting advanced changes.

What if the problem continues?

Back up important data, review error messages, test one change at a time, and use official support resources when the issue affects security or system stability.