Hi! I understand your Three app won't connect to your hub unless you clear the cache and data. Let's try to get this sorted out properly. Just to clarify a bit:

- Is it just the hub connection that fails, or are there issues logging into the app too?
- And when you say "clearing cache and data," do you do this every time before connecting anew?

This info will help me suggest the best steps. In the meantime, here's what you can try:

1. Check data allowance and connection: Open the Three app or log into My3 to make sure your data allowance is active and enough for usage. Insufficient allowance can block hub connections.
2. Verify network and app updates: Ensure your Android 10 device and Three app are fully updated — outdated versions can cause bugs.
3. Restart your phone and hub: Sometimes simply turning off and on your phone and the hub refreshes network settings and clears minor glitches without clearing app data manually.
4. Try resetting network settings: On Android 10, go to Settings > System > Reset Options > Reset Wi-Fi, mobile & Bluetooth. This resets network settings without touching app data and might help.
5. Reinstall the app: If you haven't done so, uninstall the Three app entirely, then reinstall it fresh from the Play Store. This can clear deeper app issues beyond cache.

If the problem persists even after these steps, it could be an app bug causing the cache/data clearing to be the only fix temporarily. Should that be the case, I might recommend escalating this to Three’s technical team for an app patch or deeper investigation.

Let me know how these steps work for you or if you have already tried any!

Are you okay to try this out now?