Dialing *71 followed by a phone number on a landline or mobile service (like Verizon) activates Conditional Call Forwarding, sending calls to that number only when you're busy or don't answer, but it's a carrier-specific code and might not work everywhere, unlike codes for unblocking Caller ID (like *82) or checking forwarding (*#21#).
Forward Calls Only When Busy or on Another Line
Use this feature to send calls to another phone when your phone is busy or when you don't answer after three or four rings: Dial *71 and the number you want to forward calls to. You may activate Conditional Call Forwarding through My Verizon as well.
Dial *#62# to check if your voice or messages are being forwarded. Then dial ##62# to cancel #reject #TechSavvy #changeisgood.
Call Retrieve Used to retrieve a parked call. Enter *88 followed by the extension that call is parked against. If the call is parked against your own extension, press the # key.
This Vertical Service Code, *82, enables calling line identification regardless of subscriber preference, dialed to unblock withheld numbers (private callers) in the U.S. on a per-call basis.
Dialing *77 on your phone activates Anonymous Call Rejection, blocking incoming calls from private or blocked numbers, making anonymous callers hear a message to hang up and try again. It's a landline/VoIP feature (like AT&T, CenturyLink) to stop spam/prank calls but can sometimes vary by carrier or state, potentially connecting to emergency services (like *87 to turn it off).
When you dial \*67 before a phone number, it blocks your caller ID for that single call, making your number appear as "Private," "Blocked," or "Unknown" to the recipient, allowing for temporary anonymity. This works on most landlines and cell phones but doesn't work for toll-free numbers (like 800) or emergency services (like 911).
The code *#61# is a feature in mobile networks that allows you to check the status of call forwarding when your phone is unreachable or busy.
No. 1- *#9900# If you dial this code on your keypad, a window will open where you can click on 'Delete dumpstate/ logcat' to remove all junk files from your phone, making it a bit faster!
Call Block, otherwise known as Call Screening, is a feature that allows you to block calls from up to 10 phone numbers within your local calling area for a low monthly rate. Turn on: Press *60. If prompted, press 3 to turn the feature on.
Dialing *#21# on your phone checks the status of your unconditional call forwarding, revealing if your calls, texts, or data are being redirected to another number without you knowing, often without leaving traces on your phone bill; it's a standard network code to see your carrier's call forwarding settings, not a definitive "hacking" tool, but useful for detecting unauthorized forwarding.
Call forwarding on Android
Activate Call Trace
Hang up the phone after receiving a harassing call. Pick up the phone and press *57 (touch tone) or 1157 (rotary). You'll hear a confirmation tone and message will be heard If the trace is successful.
🔐📞 ##002# instantly cancels all call forwarding on your phone — busy, unreachable, or no-answer. It's a simple way to reset settings and protect your privacy. ✅ Just dial ##002# and hit send.
Yes, *67 still works in 2025! If you dial *67 before a phone number, it hides your caller ID, so the person you're calling sees “Private” or “Blocked” instead of your number. This works on both iPhone and Android devices.
3️⃣ Dial *#2663# to refresh your Wi-Fi and boost internet speed. Click on TSP FW Update for touch screen firmware updates.
Depending on the malware, attackers can track GPS, log keystrokes, or even control your microphone and camera. Tracking apps and mobile spyware: Parents, jealous partners, or hackers can install spyware on your phone to monitor calls, messages, and location.
Quick Tip: Test Your Samsung Phone with *#0*# Before buying a Samsung phone, use the code *#0*# to check its hardware! This secret menu lets you test the screen, buttons, speakers, sensors, and more. It's a quick way to ensure everything works perfectly and avoid issues later.
On Android:
Open Phone → Settings → Call Forwarding → Disable All. Or dial ##002# to stop all active forwarding instantly.
7 Proven Ways to Make Your Phone Unreachable
Access the personal IMEI number by keying *#06# the 15 digit serial number will appear on the screen. Make a note of the number and register the details with your operator, in the event that your phone is stolen you report it to you operator who should then be able to bar the SIM card.
You can also use *82 to unblock your number in case your call gets rejected temporarily.
The *#21# code checks the status of unconditional call forwarding. Dialling this code will display whether your calls are being forwarded to another number unconditionally, meaning all incoming calls are being redirected regardless of the condition.