Hi! I understand you're having trouble logging into the Airthings app on your Huawei Android phone because the keyboard doesn’t show up when you try to enter your login details. Let’s dig into that and try to get it sorted.

First, just to clarify:
- Is the keyboard completely missing only when you open the Airthings app, or does it also not appear in other apps?
- Have you tried restarting your phone or reinstalling the Airthings app yet?

Meanwhile, here’s a step-by-step approach we can try based on common issues with Huawei phones and keyboards:

1. Restart Your Phone: Sometimes, a quick reboot clears temporary glitches. Hold down the power button and restart.

2. Check Keyboard Settings:
- Go to Settings > System & updates > Language & input > Default keyboard and ensure you have an input method set (like Huawei’s own keyboard or Gboard).
- If you use a third-party keyboard, try switching back to the built-in Huawei keyboard.

3. Clear Cache and Data of Airthings App:
- Go to Settings > Apps > Airthings > Storage > Clear Cache and Clear Data. This can reset the app to a fresh state.

4. Update or Reinstall the App:
- Open the Google Play Store, check if Airthings app has an update. If yes, update it.
- Otherwise, uninstall the app and reinstall it.

5. Check Keyboard Permissions:
- Sometimes apps need permission to bring up the keyboard properly. Go to Settings > Apps > Airthings > Permissions and make sure nothing looks suspiciously disabled.

6. Try Signing in Using a Different Keyboard App:
- If you have access to the Play Store, try downloading and using another keyboard app like Google’s Gboard.
- Set it as default temporarily and try logging in again.

7. Ensure No Other Apps Are Blocking the Keyboard:
- Sometimes apps that overlay screens (like screen recorders or filter apps) interfere with keyboard input. Try disabling them temporarily.

If after this the keyboard still doesn’t appear in the Airthings login screen, Huawei’s keyboard on some phones has had known compatibility issues with certain apps. In that case, switching to Gboard or another keyboard usually resolves it1 5.

Could you let me know what happens as you try these steps? I’m here to help you through it!