* * 21 *number# – Activate Call forwarding Using the above code will redirect all incoming calls to a number you choose and save your phone from buzzing a lot and consequently help you to concentrate. I use **21*190# which works perfect on MTN Uganda, Airtel Uganda and Africell.
Security of Android Smartphone codes : Code ## 002 # ~ Deactivates all forwarding. Code * # 21 # ~ To know whether message or call has been diverted or not. Code * # * # 4636 # * # * ~ To know Wifi connection test, Phone battery.
According to tech magazine How-To Geek, dialing this code shows whether or not call forwarding is enabled on the device — not whether it's been hacked. How-to Geek described the *#21# feature as an “interrogation code” that allow users to view their call forwarding setting from the phone app.
*31# (Disable Caller ID)
If you want to keep your privacy and prevent others from knowing when you call them, you can disable caller ID by using this code.
Call forwarding is often enabled by dialing *72 followed by the telephone number to which calls should be forwarded. Once someone answers, call forwarding is in effect. If no one answers or the line is busy, the dialing sequence must be repeated to effect call forwarding. Call forwarding is disabled by dialing *73.
Dial the code, followed by the number you wish to forward calls to, followed by the # sign. Example: *21*123-456-7890#. Press Call.
*57 is a call tracing service offered by most phone companies. It allows you to easily trace calls made to your phone number. Essentially, *57 records the calling number and other identifying information such as the date and time of the call.
The *#9900# code is a diagnostic mode code for Samsung mobile devices. It can be used to access a variety of system information and diagnostic tools, such as enabling/disabling fast dormancy, logging options, and system dump mode.
With the *#62# settings interrogation code, you can see if calls or texts are being forwarded to another number whenever you're unreachable. If the "Voice Call Forwarding," "Data Call Forwarding," and "SMS Call Forwarding" all say they're disabled, good.
Code to check if phone is tapped: *#21# Code to show unknown connections and tracking (for Android): *#*#4636#*#* or *#*#197328640#*#* Code to show unknown connections and if someone is tracing you (for iPhone): *3001#12345#*
Unusually High Data Usage
An unusual surge in the amount of data your phone is consuming can sometimes be a sign spyware is running in the background. The spy app needs to use data to send information back to the perpetrator, so a spike in data usage may indicate foul play.
How to get missed call alerts and still block call. Go to your phone's dialer and input the following activation code: **21*0722199199#. If you have completed the process, you will get a response message with Succeeded. Deactivation is easy.
Code: *#30#
In that case, you can use this code to check if Call Line Presentation is enabled or disabled.
What is *#62 used for? *#62 is a short code that can be used to check whether your calls have been redirected or diverted without your consent. It does not, however, work on all Android phones.
Key hardware info: *#0*#
When you enter *#0*# into the phone's dialer, the device enters service mode and brings up a diagnostics menu.
*2767*3855# – Format device to factory state (will delete everything on phone)
*#21# - By dialling this USSD code, you would get to know if your calls have been diverted somewhere else or not. *#62# - With this, you can know if any of your calls - voice, data, fax, SMS etc, has been forwarded or diverted without your knowledge.
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.
To check if call waiting is set up on your phone, dial *#43#. Then, you can dial *43# to enable call waiting, or #43# to disable call waiting.
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.
How does * 61 * number work? Dial *#61# to request status of call diversion on your number when you are not responding. Dial *#67# to request status of call diversion on your number when your line is busy. Dial *#62# to request status of call diversion on your number when your handset is turned off or has not coverage.
To forward calls, if the phone is switched off or out of reach in a BSNL number, dial **62*number# from the phone. To deactivate, dial ##62#. There is also a provision to forward all calls coming to a number. The user has to dial the code **21**number# from the number to activate this provision.
In Android, dialing *#21# is not recognised as any USD code or any IMR service. As you dial it, it will connect you as a normal call and rejects it because this ohone number is not linked or not associated with any business or government services. It doesn't do anything.