Hi there! I understand you're logging into the USPS app on your Android device, but after login, nothing is showing up on the screen. That sounds like it’s stopping you from using the app properly. Just to make sure I get this right: Does the app just show a blank or white screen after you log in, or do you see any error messages or loading icons?

Meanwhile, here’s a straightforward step-by-step guide to try to resolve the blank screen issue on your Android 10 device using the WebKit browser environment:

1. Clear App Cache and Data
- Go to your phone’s Settings.
- Tap on Apps or Applications.
- Find and select USPS.
- Tap Storage > then tap Clear Cache.
- After clearing the cache, also tap Clear Data or Clear Storage. This won’t delete your account but resets the app.
- Restart the app and try logging in again.

2. Check for App Updates
- Open the Google Play Store.
- Search for USPS Mobile.
- If there’s an update available, tap Update. Sometimes issues get fixed with new updates.

3. Restart Your Phone
- Fully power off your device, wait for 30 seconds, then power it back on. This can refresh background services.

4. Uninstall and Reinstall the USPS App
- Uninstall the USPS app from your phone.
- Restart your device.
- Reinstall the app from the Google Play Store.

5. Check Internet Connection
- Confirm your Wi-Fi or mobile data is stable.
- Try switching between Wi-Fi and mobile data to see if one works better.

6. Check App Permissions
- Go to Settings > Apps > USPS > Permissions.
- Make sure the app has permissions enabled for storage and network access.

7. Try Logging in From a Different Browser or Device
- Since your device uses WebKit (likely Chrome or a browser based on it), test logging into USPS on a different browser or device. This can help isolate if the problem is specific to the app or your device.

If after trying all these the app still shows nothing after login, there could be a temporary server-side issue or a bug. You might want to reach out directly to USPS mobile support at [email protected] for deeper troubleshooting.

Let me know which steps you’ve already tried or if you notice any specific error messages or behaviors while logging in! I’m here to help. Are you satisfied with the solution I provided so far?