How to Fix ‘Failed to Connect to Server’ in FiveM on T-Mobile

Trying to play FiveM but keep getting the dreaded “Failed to Connect to Server” message? Super frustrating, right? If you’re using T-Mobile, you might run into some extra hurdles. But don’t worry! We’ve got your back. Here’s how to fix it step by step.

1. Check Your Internet Connection

Sometimes, the simplest solution is the correct one. Make sure your internet is actually working.

• Open a browser and visit any website.
• Try running a quick speed test.
• Restart your router or hotspot if needed.

If your internet is working fine, move to the next fix.

2. Disable IPv6

FiveM and IPv6 don’t always get along. Turning it off might help.

1. Press Windows + R and type ncpa.cpl, then hit Enter.
2. Find your active internet connection.
3. Right-click it and select Properties.
4. Uncheck Internet Protocol Version 6 (TCP/IPv6).
5. Hit OK and restart your PC.

Now try connecting to FiveM again.

3. Use a VPN

T-Mobile sometimes restricts certain connections, which could be blocking FiveM. A VPN can bypass these restrictions.

• Download a trusted VPN like ProtonVPN, Windscribe, or ExpressVPN.
• Install and connect to a server (preferably in your region).
• Try launching FiveM and joining a server.

Did this work? Great! If not, keep reading.

4. Change Your DNS

Switching to a better DNS server may improve connectivity.

1. Open Control Panel and go to Network and Internet.
2. Click Network and Sharing Center.
3. Select Change adapter settings in the left panel.
4. Right-click your active connection and choose Properties.
5. Select Internet Protocol Version 4 (TCP/IPv4) and click Properties.
6. Check Use the following DNS addresses and enter:
   • Primary DNS: 8.8.8.8
   • Secondary DNS: 8.8.4.4
7. Click OK and restart your network.

Now test FiveM again.

5. Port Forwarding (Advanced Users)

Sometimes, FiveM has trouble connecting if certain ports aren’t open. You can forward ports manually.

1. Log in to your router (usually 192.168.1.1 or 192.168.0.1).
2. Find Port Forwarding or Virtual Server settings.
3. Add these ports:
   • 30120 (TCP & UDP)
   • 30110 (TCP & UDP)
4. Apply the changes and reboot your router.

Then check if you can connect.

6. Restart FiveM and Clear Cache

FiveM cache might be causing issues. Clearing it can help.

1. Open FiveM and go to Settings.
2. Find Clear Cache and click it.
3. Restart FiveM.

If that doesn’t work, do a full manual cache wipe:

• Close FiveM completely.
• Press Windows + R and type %localappdata%, then hit Enter.
• Open the FiveM folder.
• Delete the cache folder.
• Restart FiveM and try connecting.

7. Switch to a Personal Hotspot (Temporary Fix)

Sometimes, T-Mobile’s network restrictions get in the way. If you have another mobile device, try using its hotspot.

1. Turn on your phone’s hotspot.
2. Connect your PC to it.
3. Try launching FiveM.

If this works, then T-Mobile’s network was the issue. You may want to consider a VPN or contacting T-Mobile support.

8. Contact T-Mobile Support

If all else fails, reach out to T-Mobile. They might have specific solutions for game connectivity issues.

• Visit their website or call customer support.
• Ask if your account has any network restrictions.
• Request a change to a less restrictive NAT type.

Sometimes, they can fix things in minutes.

Final Thoughts

Getting the “Failed to Connect to Server” error in FiveM can be annoying, but it’s not impossible to fix. Try the methods we listed, one by one. One of them is bound to work!

Now, go enjoy your time in FiveM without headaches!