Troubleshooting

Common fixes for known issues with JSS CallBlocker.

Installation & Play test enrollment

• Not seeing the test build on Play? Make sure you joined the closed test track using the same Google account as on the device.
• Still not available? Play can take up to 1–2 hours after opting in. Try again later or clear Play Store cache.
• Old build conflicts: Uninstall any previous APKs before installing from the Play listing.

Permissions & “Why don’t I see my calls?”

• Default Caller ID & spam app: Ensure CallBlocker is set as the default. Without this, blocking/identification is limited.
• Contacts: Needed for the Known/Unknown filter and to recognize trusted callers.
• Call Logs: Needed to import recent numbers from your call history.
• Where to re‑enable: Settings → Apps → CallBlocker → Permissions.

Calls aren’t being blocked

• Default app: Confirm CallBlocker is the default Caller ID & spam app.
• Battery optimization: Some OEMs stop background services. Mark CallBlocker as Don’t optimize in system battery settings.
• List membership: Verify the caller is actually on your blacklist (or that Unknown/Anonymous blocking is enabled in Settings, if using those).
• Dual SIM: If issues occur only on one line, test the other SIM and check carrier call settings.

Import & list management

• Known vs Unknown: Use the toggle while importing to switch between address‑book numbers and outsiders.
• Smarter import: The app scans beyond the first batch so you don’t “run out” of numbers.
• Undo delete: If you remove an entry by accident, tap Undo on the snackbar prompt.
• Prefix blocking: Add partial numbers (e.g., 224) to block common spam ranges.

Backups

• Encrypted: Backups are encrypted and kept on your device (or your chosen destination).
• Counters: Hit counters are not restored by design, so stats start fresh after a restore.