Hello! I see you're having trouble with the Bank Muscat app on Android 4. To better assist you, could you please tell me what specific issue you're encountering? For example, does the app fail to open, crash, or show an error message?

Also, I want to note that Android 4 is quite an old version, and many modern apps, including banking apps, often require newer versions of Android to function properly. Bank Muscat’s app may not support Android 4 fully, which could be causing the problem.

Meanwhile, here are a few steps you can try:

1. Check for App Compatibility: Make sure the Bank Muscat app version you downloaded supports your Android version. If it's not compatible, it might not work correctly.

2. App Update: If you have an older version of the Bank Muscat app installed, check the Google Play Store for any available updates.

3. Clear App Cache and Data:
- Go to your device's Settings > Apps > Bank Muscat.
- Tap Storage, then tap Clear Cache and Clear Data.
- Restart your device and try opening the app again.

4. Reinstall the App:
- Uninstall the Bank Muscat app.
- Restart your phone.
- Go back to Google Play Store and install the app again.

5. Restart Your Device: Sometimes, a simple restart fixes temporary software glitches.

If these steps don’t help, it’s quite possible that the app simply isn’t supported on Android 4. You might need to upgrade to a newer Android version if your device supports it. Alternatively, you can access Bank Muscat’s services via their mobile website or contact their support for guidance.

Would you like me to help with any of these steps in more detail or check if your device can be upgraded? Let me know!