If your Samsung Galaxy S25 Ultra is having issues with mobile data, it can be frustrating and disruptive. Fortunately, there are multiple troubleshooting steps you can take to resolve this issue and restore your internet connection.

Solutions

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1. Check Your Mobile Data is Enabled

Ensure mobile data is turned on before proceeding with other troubleshooting steps.

Swipe down from the top of the screen to open the Quick Settings panel.
Look for the Mobile Data icon and ensure it is turned on.
If it is already on, toggle it off and then back on.

2. Toggle Airplane Mode

Airplane mode can refresh your network connection and fix temporary glitches.

Swipe down from the top of the screen to open Quick Settings.
Tap on Airplane Mode to enable it.
Wait for 30 seconds, then disable Airplane Mode.
Check if mobile data is now working.

3. Restart Your Phone

A simple reboot can fix many connectivity issues.

Press and hold the Power button.
Select Restart and wait for your phone to reboot.
Once the phone turns back on, check if mobile data is working.

4. Check for Network Outages

Sometimes, the issue may be with your carrier rather than your phone.

Visit your carrier’s website or check their social media for outage updates.
Try using Wi-Fi to see if you can access the internet.
If an outage is reported, wait until the network is restored.

5. Verify Your APN Settings

Incorrect APN (Access Point Name) settings can prevent mobile data from working.

Open Settings.
Go to Connections > Mobile Networks > Access Point Names.
Select your carrier’s APN.
If APN settings are incorrect, reset them to default by tapping Reset to Default.
Restart your phone and check mobile data.

6. Reinsert Your SIM Card

A misaligned SIM card can cause network issues.

Turn off your phone.
Use a SIM ejector tool to remove the SIM card.
Wait for a few seconds, then reinsert the SIM card properly.
Turn the phone back on and check if mobile data is working.

7. Enable the Correct Network Mode

Your phone may not be using the best network type available.

Open Settings.
Go to Connections > Mobile Networks.
Tap Network Mode and select 5G/4G/3G/2G (Auto Connect).
Restart your phone and check if mobile data is working.

8. Disable Data Saver Mode

Data Saver Mode can limit mobile data access in the background.

Open Settings.
Go to Connections > Data Usage.
Tap on Data Saver and ensure it is turned off.

9. Check for Software Updates

Outdated software can cause connectivity problems.

Open Settings.
Go to Software Update.
Tap Download and Install.
If an update is available, install it and restart your phone.

10. Reset Network Settings

Resetting network settings can fix connectivity problems by restoring default settings.

Open Settings.
Go to General Management > Reset > Reset Network Settings.
Tap Reset Settings and confirm.
Your phone will restart, and you will need to reconnect to Wi-Fi and reconfigure Bluetooth.
Check if mobile data is now working.

11. Remove Any VPN or Proxy Settings

A VPN or proxy server may interfere with mobile data connections.

Open Settings.
Go to Connections > More Connection Settings.
Tap on VPN and disable any active VPN.
If using a proxy, go to Wi-Fi > Advanced and ensure no proxy is set up.

12. Contact Your Carrier

If none of the above solutions work, your carrier may need to intervene.

Call your carrier’s customer support and report the issue.
Ask if there are any restrictions on your account that might be blocking mobile data.
Request a SIM card replacement if needed.

If your Samsung Galaxy S25 Ultra’s mobile data is still not working after following these steps, consider reaching out to Samsung support or visiting an authorized service center for further diagnosis. A faulty SIM card or internal hardware issue may require professional assistance.

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