Hi there! I understand your iBand app is crashing on your Blackview Android phone. Let me help you fix that. To better assist, could you tell me:

- When does the app typically crash? Right at launch, during use, or at a specific feature?
- Have you recently updated the iBand app or your phone OS?
- Have you tried any troubleshooting steps so far, like restarting the phone or reinstalling the app?

This info will help me tailor the best solution for you. Meanwhile, here's a general step-by-step approach we can try:

1. Restart your Blackview phone to refresh its system.
2. Clear the iBand app cache and data:
- Go to Settings > Apps > iBand > Storage > Clear Cache, then Clear Data.
3. Check if the iBand app has an update in the Google Play Store and install it.
4. Ensure your phone OS is up to date: Settings > About Phone > System Update.
5. If it still crashes, uninstall the iBand app fully, then reinstall it fresh from the Play Store.

If the issue remains after these steps, we can try deeper fixes like starting the phone in Safe Mode to check for conflicts with other apps, or checking storage space. Let me know your answers to my questions or if you want to proceed with these steps!