If you are experiencing issues with Roamless where you cannot connect to the server and the application crashes, follow these steps to resolve the problem:

1. Reset Network Settings:
- Open Roamless and look for the settings option.
- Scroll down and select Reset Settings. This will reset your APN settings and may restore your 4G/LTE/5G data connectivity, which could help establish a connection to the server - learn more.

2. Check Internet Connection:
- Ensure that your internet connection is stable. You might want to restart your router or switch from Wi-Fi to mobile data or vice versa.

3. Restart the Application:
- Completely close Roamless and then restart the application. Sometimes, restarting the app clears temporary issues affecting connectivity and performance.

4. Update the Application:
- Ensure that you have the latest version of Roamless. Go to the app store on your device, search for Roamless, and check if an update is available. Update the app if necessary.

5. Clear Cache:
- Navigate to the app settings on your device and locate Roamless.
- Clear the cache and data which can sometimes resolve issues with corrupted files.

6. Restart Your Device:
- A simple solution is to restart your device. This can fix various issues, including connectivity problems.

7. Check Device Storage:
- Ensure your device has sufficient storage space. Low storage can hinder app performance leading to crashes.

8. Reinstall Roamless:
- If the problem persists, consider uninstalling and reinstalling the Roamless app. This will provide a fresh installation that may resolve issues.

9. Check for System Updates:
- Make sure your operating system is up-to-date, as outdated systems can cause app compatibility issues. Go to your device settings and check for updates.

If the above steps fail to resolve the issue, you may want to reach out to Roamless support through their help page for further assistance - learn more.