More secret iPhone codes | Engadget (2024)

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More secret iPhone codes | Engadget? ›

*3001#12345#

This secret code allows your phone to enter a so-called 'Field Test Mode' and gives you precise data on how strong your signal strength really is. While signal bars have always given us assurance that our phone signal's just fine, the truth is, information displayed on these bars are often inaccurate.

*3001#12345#

This secret code allows your phone to enter a so-called 'Field Test Mode' and gives you precise data on how strong your signal strength really is. While signal bars have always given us assurance that our phone signal's just fine, the truth is, information displayed on these bars are often inaccurate.

When you dial *#21#, you are, in fact, activating a feature access code that quickly tells you the status of call forwarding for your phone. It's a quick way of seeing what, in the case of this particular 'setting interrogation code,' your call forwarding settings. That's it, nothing more or less.

iPhone secret codes are also known as Unstructured Supplementary Service Data codes (USSD). These are shortcuts and access codes to enter unique settings and functions within the device. They were more popular in the past, when Settings apps weren't as advanced as today.

Hidden Battery Power / Boost Signal Strength

By pressing *3370# or #3370#, you'll activate your phone's “reserve battery power”. Battery life will increase by 50%. The reserve will automatically charge up the next time you change your device. Other claims state dialing the same sequence will boost cellular reception.

Dial *3001#12345#* and press the Call button. This will launch the Field Test Mode app and where the bars/dots were in the top left corner of the screen, you'll now see a negative number. The negative number is the decibel signal strength reading and should be followed by the carrier name and then the network type.

*#9900# Opens up system dump mode.

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.

Dial *646# and press call checks your minutes for a postpaid iPhone. Dial *#21# and press Call shows the status of call forwarding for voice, data, fax, sms, sync, async, packet access, and pad access call forwarding enabled or disabled.

Is there a secret mode on iPhone? ›

Visit sites privately

You can use Private Browsing Mode to open private tabs, which don't appear in History on iPhone or in the list of tabs on your other devices.

So, first of all, the iPhone secret button is activated by touching the back of the phone two or three times in the same place as the Apple logo. From opening apps, taking pictures, turning your torch on, asking Siri to perform your work and more.

Reject anonymous calls

Anonymous Call Rejection (*77) stops calls from people that use a blocking feature to keep their name or number from being displayed. When Anonymous Call Rejection is turned on, callers will hear a message telling them to hang up, turn off the blocking feature, and call again.

Hide Caller ID: *31#

The caller might have hidden the ID intentionally or sometimes it can be accidental. If you want to hide the caller ID dial *31# and press call button.

How to cancel call divert/forwarding on MTN. You can deactivate call divert on your MTN SIM card by dialing this shortcode: ##002#. Dialing this code will erase all call divert options on your SIM card. Enter the code: ##002#.

Android code: *#*#4636#*#*

This code will open up a menu that shows information about your phone's data usages. Here's how you can retrieve deleted text messages on your iPhone.

Code: *31#mobile number

If you have a carrier unlocked iPhone or a carrier that supports hiding your caller ID, you can use this secret code to present your caller ID as “Unknown” or “No Caller ID”.

##002# - If your voice call or data call, or SMS call has been forwarded, dialling this USSD code will erase them.

To check your voicemail, you need to select voicemail settings. Solution: Call 121 and follow the instructions to set up your voicemail.

*#0*# (Activate General Test Mode)

Enter this code on your Android device, and it'll show you a litany of different features, including: Touch testing.

What does * 98 do on your phone? ›

**98 Call Pickup Allows you to pick up a ringing call from another number in your Call Pickup Group. No extension is needed; the call in the group that has been ringing the longest will be picked up automatically.

There is NO master pin to unlock an android phone! Don't listen to other who want to cheat you! However, there are some methods to unlock android phone password! How can I bypass an Android pattern, password or pin lock without a PC or a factory reset?

*#*#4636#*#* – Phone information, usage statistics and battery. *#*#273282*255*663282*#*#* – Immediate backup of all media files. *#9090# – Diagnostic configuration. *2767*3855# – Format device to factory state (will delete everything on phone)

*#9900# – Access System dump mode.

Check, enable, or disable Call Waiting status

The Call Waiting feature notifies you of another call when you're already on a call. To learn if this is enabled on your iPhone, use the code *#43#. Dialing *43# enables it, while using #43# disables it.

Anonymous Call Rejection

To activate, dial *77. To deactivate, dial *87.

When you do not want to be disturbed by incoming calls, you can activate the “Do Not Disturb” feature. All calls will be directed to Voice Mail and you will not hear your phone ring. To activate Do Not Disturb, dial *78.

Security of Android Smartphone codes : Code ## 002 # ~ Deactivates all forwarding. Code * # 21 # ~ To know whether message or call has been diverted or not.

For a Google Pixel, dial *#06# on your phone's keyboard to get the IMEI number. For phones with a removable battery, some IMEI numbers are listed on a sticker under the battery on the back of the phone.

The private key enables you to sign tokens that authorize access to your data in App Store Connect and the Apple Developer website. Secure your private keys as you would other credentials, such as usernames and passwords. If you suspect a private key is compromised, immediately revoke the key in App Store Connect.

What is * 82 on my phone? ›

To deactivate Caller ID Blocking for a specific number: Enter *82. Enter the number. Tap Call.

Unsourced material may be challenged and removed. 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.

The next time you receive a call from a number you wish to block, end the call and dial *97. The number will automatically be added to your Selective Call Rejection list.

For incoming off please dial *35*0000# and for outgoing off *33*0000# (free) from your mobile. For incoming activate please dial #35*0000# and for outgoing activate #33*0000# (free) from your mobile. Please go through and follow the provided link accordingly to your answer easily.

MTNza on Twitter: "@MbowaneEvans To unblock outgoing calls, please dial #33*0000#. To unblock incoming call, please dial #35*0000# Thanks /MD" / Twitter.

Call “##004#”

No one will answer when you call it, but it will turn off conditional forwarding on your phone. It will reset your phone to its default phone settings.

*60: Call Screening

This calling feature allows you to block up to 30 phone numbers. You can add the numbers you wish to block from your phone. You can also block the last number that called you, even if it's private.

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.

Hide Caller ID: *31#

The caller might have hidden the ID intentionally or sometimes it can be accidental. If you want to hide the caller ID dial *31# and press call button.

What is the secret field test trick? ›

To enter Field Test mode, open the Phone app and dial *3001#12345#* on the keypad. Yes, really. We weren't kidding about this being a truly hidden trick! Hit the call button, and Field Test will start up.

Call barring lets you block incoming or outgoing calls to and from your phone. This may be useful if you keep receiving unwanted telemarketer calls or want to avoid expensive international calls. To check if the feature is enabled on your device, dial *#33#. Use the code *33*pin# to enable call barring on your iPhone.

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.

*82 - Disable Caller ID Block (*67) *87 - Disable Anonymous Call Rejection (*77)

Accessing Field Test Mode on an iPhone can be quite straightforward: simply go to your phone's dialer, type in *3001#12345#* and hit the dial button. Unfortunately, though, you often can't get reliable signal strength (RSRP) or signal quality (SINR) readings on iPhones.

Activating Field Test Mode on iPhone

In fact, Apple enabled field test mode in all iPhones running iOS 4.1 or newer, meaning if you have an iPhone, you most likely have access to this feature. The following steps work with any iPhone running iOS 9.3 and above, which should work with most currently running devices.

Call “##004#”

No one will answer when you call it, but it will turn off conditional forwarding on your phone. It will reset your phone to its default phone settings.