How to Fix Galaxy S25 Mobile Data Not Working After Update

Galaxy S25 Mobile Data Not Working After Update is usually caused by update-related setting changes, damaged caches, or a service that failed to reload properly after the latest software install.

For related help, also see How to Fix Galaxy S25 Fast Charging Not Working After Update, How to Fix Galaxy S25 Texting Problems, How to Fix Galaxy S25 Not Charging After Update, and the Galaxy S25 hub.

Method 1: Toggle Airplane Mode and restart the phone

The modem may fail to re-register on the network after a firmware update until the radio stack is reset.

1. Swipe down from the top of the screen and turn Airplane mode on for 30 seconds.
2. Turn Airplane mode off again.
3. Restart the phone and test mobile data.

Method 2: Check whether mobile data is actually enabled for your SIM

Some updates reset SIM preferences, especially on dual-SIM phones.

1. Open Settings > Connections > Data usage.
2. Make sure Mobile data is turned on.
3. If you use dual SIM, confirm the correct line is selected for data.

Method 3: Re-select the network mode and preferred SIM

A bad update migration can switch the device to the wrong network type or inactive line.

1. Go to Settings > Connections > Mobile networks.
2. Check Network mode and use the recommended 5G/LTE automatic option for your carrier.
3. If you use two SIMs, make sure the right SIM is chosen for Mobile data.

Method 4: Reset the APN to default

Corrupted APN settings are one of the most common causes of mobile data failure after updates.

1. Open Settings > Connections > Mobile networks > Access Point Names.
2. Open your carrier APN menu.
3. Tap the three-dot menu and choose Reset to default.

Method 5: Reinsert the SIM or refresh the eSIM line

The update may leave the line registered incorrectly until the SIM profile is refreshed.

1. Power off the phone.
2. If you use a physical SIM, remove it, wait a few seconds, and reinsert it.
3. If you use eSIM, go to your SIM settings and toggle the line off and back on if your carrier allows it.

Method 6: Reset network settings

This clears broken cellular, Wi-Fi, and Bluetooth configuration left behind by the update.

1. Go to Settings > General management > Reset.
2. Tap Reset network settings.
3. Reconnect to your carrier and test data again.

Method 7: Install carrier and firmware updates

Samsung and carriers often release follow-up patches when a data bug appears after an update.

1. Open Settings > Software update > Download and install.
2. Install any available update.
3. Restart the phone and test mobile data again.

Method 8: Contact your carrier if calls and texts work but data still fails

If the phone connects to the network but data never starts, the line may need reprovisioning.

1. Confirm whether your account still has mobile data service.
2. Ask the carrier to refresh provisioning for your SIM or eSIM.
3. Tell them the issue started immediately after the latest update.

If the problem continues after all of the steps above, visit the main Galaxy S25 page for more troubleshooting guides.