Phone tapping and surveillance are legitimate concerns in today's digital world. Whether you suspect unauthorized monitoring, call forwarding, or spyware on your device, there are specific codes you can dial to check for various types of interference. This guide will show you 9 important numbers and codes to help detect if your phone is being tapped or monitored.
Understanding Phone Tapping
Phone tapping can occur through various methods:
- Call forwarding to another number
- Spyware or monitoring apps
- Network-level surveillance
- SIM card cloning
- Malware infections

Detecting phone tapping helps protect your privacy and security.
9 Numbers and Codes to Check for Tapping
1. *#21# - Check Call Forwarding
This code shows if your calls are being forwarded to another number.
How to use:
- Dial *#21# on your phone
- Press the call button
- Check the displayed information
- Look for any forwarded numbers
What to look for:
- If it shows "No Call Forwarding" - you're safe
- If it shows a number - your calls are being forwarded
- Note any unknown numbers
2. ##002# - Disable All Call Forwarding
This code disables all call forwarding on your device.
How to use:
- Dial ##002#
- Press call
- Wait for confirmation
- All forwarding should be disabled
When to use:
- If *#21# showed forwarding was enabled
- As a preventive measure
- After suspecting interference

USSD codes help you check and disable call forwarding.
3. *#62# - Check Call Forwarding When Unreachable
This code checks if calls are forwarded when your phone is unreachable.
How to use:
- Dial *#62#
- Press call
- Review the information displayed
- Check for any forwarded numbers
4. *#67# - Check Call Forwarding When Busy
This code checks if calls are forwarded when your line is busy.
How to use:
- Dial *#67#
- Press call
- Check for forwarding information
5. *#06# - Check IMEI Number
This code displays your phone's IMEI (International Mobile Equipment Identity) number.
How to use:
- Dial *#06#
- Your IMEI will be displayed
- Write it down and keep it safe
- Compare with device settings if suspicious
Why it matters:
- IMEI can be used to track or block your device
- If someone has your IMEI, they might clone your device
- Report to carrier if IMEI is compromised

Checking your IMEI helps detect device cloning or tracking.
6. *#*#4636#*#* - Android Testing Menu
This code opens Android's testing menu (Android only).
How to use:
- Dial *#*#4636#*#*
- Testing menu will open
- Check phone information
- Review network and usage statistics
What to check:
- Unusual data usage
- Suspicious network activity
- Unknown connections
- Battery usage by apps
7. *3001#12345#* - iPhone Field Test Mode
This code opens iPhone's Field Test Mode (iOS only).
How to use:
- Dial *3001#12345#*
- Field Test Mode opens
- Check signal strength and network info
- Look for unusual activity
What to look for:
- Unusual signal patterns
- Unknown network connections
- Suspicious data transmission
8. *#*#232338#*#* - Check WiFi MAC Address
This code displays your WiFi MAC address (Android).
How to use:
- Dial *#*#232338#*#*
- MAC address will be displayed
- Compare with device settings
- Check for changes
Why it matters:
- MAC address can be used for tracking
- Changes might indicate tampering

Testing menus provide detailed information about your device's status.
9. *#*#0*#*#* - LCD Test (Android)
This code runs LCD tests and can reveal device information.
How to use:
- Dial *#*#0*#*#*
- LCD test screen appears
- Check device information
- Look for anomalies
Additional Signs Your Phone Might Be Tapped
1. Battery Drains Quickly
Spyware and monitoring apps can cause rapid battery drain.
2. Unusual Data Usage
Check for spikes in data usage that can't be explained.
3. Phone Gets Hot
Excessive background activity can cause overheating.
4. Strange Noises During Calls
Clicking, static, or echoes might indicate interference.
5. Delayed Shutdown
If your phone takes unusually long to turn off, spyware might be running.
6. Apps Behaving Strangely
Apps crashing or behaving unexpectedly might indicate interference.

Multiple signs can indicate your phone is being monitored or tapped.
How to Protect Your Phone
1. Check Installed Apps
Regularly review installed apps for suspicious software.
2. Use Antivirus Software
Install reputable antivirus to detect malware and spyware.
3. Keep Software Updated
Regular updates patch security vulnerabilities.
4. Avoid Unknown Sources
Don't install apps from unknown sources.
5. Use Monitoring Detection Apps
Apps like Certo Mobile Security can detect spyware.
6. Factory Reset if Needed
As a last resort, factory reset removes all software, including spyware.
What to Do If Your Phone Is Tapped
- Document evidence (screenshots, codes results)
- Disable call forwarding using ##002#
- Run antivirus scan
- Check for suspicious apps
- Change all passwords
- Contact your carrier
- Consider factory reset
- Report to authorities if needed
Legal Considerations
Phone tapping detection is legal when:
- Checking your own device
- Verifying device security
- Protecting your privacy
However, be aware that:
- Some codes might not work on all carriers
- Results may vary by device and carrier
- Professional tapping might not be detectable with codes
- Law enforcement tapping is usually undetectable
Limitations of These Codes
- Modern spyware might not be detectable with codes
- Some codes only work on specific carriers
- Advanced surveillance may bypass detection
- Codes might not reveal all types of monitoring
- Professional tapping is often undetectable
Conclusion
These USSD codes and numbers can help you detect basic phone tapping, call forwarding, and some forms of interference. While they're useful tools, they have limitations and might not detect advanced surveillance methods. If you suspect your phone is tapped, use these codes as a starting point, but also consider professional security scans, antivirus software, and consulting with your carrier. For comprehensive protection, use monitoring detection apps and maintain good security practices. Remember, if you have serious concerns about phone tapping, consult with security professionals or law enforcement.