ZTE Blade A20 secret codes

OS: Android v9.0 (Pie)

CPU: Octa core (2.1 GHz, Quad core, Cortex A73 2 GHz, Quad core, Cortex A53)

RAM: 64 GB

Display: 6.3 inches (16 cm)

Battery: Li-ion

ZTE Blade A20 smartphone runs on Android v9.0 (Pie) operating system. The phone is powered by Octa core (2.1 GHz, Quad core, Cortex A73 2 GHz, Quad core, Cortex A53) processor. It has 64 GB. Internal storage options which can be extended with the help of Yes, Up to 256 GB. The smartphone has a IPS LCD providing. The smartphone is fueled with a Li-ion. The sensors include Light sensor, Proximity sensor, Accelerometer, Compass, Gyroscope. Connectivity features in the smartphone include Bluetooth, A-GPS, NFC, 3.5 mm Jack and more.

Secret codes for ZTE Blade A20

*#06#	- International Mobile Equipment Identity
##3646633## or ##54298##	- Engineering Mode (for smartphones based on MTK processor)
##4636##	- Testing menu only have Phone Information, Usage Statistics and Wi-Fi information.
##225##	- Check your events in calendar
##426##	- Check the connectivity between the FCM server and the mobile devices
*#0011#	- ServiceMode
*#0808#	- Change USB Settings
*#9900#	- Dump mode
*#9090#	- Diagnostic configuration
#0#	- General Test Mode
*#2663#	- TSP / TSK firmware update
#12580369#	- Software and hardware info
*#0283#	- Audio Loopback Control
#7465625638#	- Insert Network Lock Key Code
##759##	- RLz Debug UI system hidden menu
##36245##	- Display a debug information about your email ID
##8255##	- Access GTalk Service Monitor
##64663##	- Hardware Test (Version, screen, led, sound, vibrate, all sensors)
##7780##	- This code erases all your mobile data.
27673855#	- Reinstall factory ROM
##232338##	- Shows Wi-Fi Mac-address
##34971539## or *#34971539#	- See camera information.
##1234##	- PDA and Phone firmware info
##7594##	- Changing the power button behavior-Enables direct poweroff once the code enabled
##1472365##	- For a quick GPS test
##273283255663282##*	- For a quick backup to all your media files
##1575##	- Full GPS test
##197328640##	- Enabling test mode for service activity
##0283##	- Packet Loopback test
*#0228#	- battery calibration

##232339## OR ##526##	- Wireless Lan Tests
##0##*	- LCD Screen Test Code
##3264##	- Show Ram version
##1111##	- FTA Software version
##2664##	- Touch-Screen test
##0588##	- Test the proximity sensor
##8351##	- Enables voice dialing logging mode
##232331##	- Bluetooth Test Mode
##232337#*#	- Shows Bluetooth device address in ZTE Blade A20
##7262626##	- Field test
##0289## OR ##0673##	- Audio test
##0842##	- Check Device Test Vibration and Backlight
##2663##	- Display device's touch-screen version
##44336##	- Displays Build time and change list number
##49862650468##*	- PDA, Phone, Hardware, RF Call Date firmware info
##8350##	- Disables voice dialing logging mode
##2222##	- FTA Hardware verion

GSM codes for ZTE Blade A20

Change code
*03old codenew codenew code#
- Change code for call barring
*04old PIN codenew PIN new PIN#
- Change SIM Card PIN code
*042old PIN2 codenew PIN2new PIN2#
- Change SIM Card PIN2 code
*05PUK codenew PUKnew PUK#
- Change SIM Card PUK code
*052PUK2 codenew PUK2new PUK2#
- Change SIM Card PUK2 code

Call waiting
*43#	- Activate waiting call
#43#	- Deactivate waiting call
*#43#	- Check status of call waiting

Configure Call Forwarding
##002#	- Disable All Call Forwarding
*004PhoneNumber#	- Set all configured call diversions to PhoneNumber
##004#	- Unregister all configured call diversions

Set call forwarding
21PhoneNumber#	- Register and activate divert all calls to PhoneNumber
##21#	- Unregister divert all calls
*21#	- Divert all calls Activate
#21#	- Divert all calls Deactivate
*#21#	- Check status of divert all calls

Set up call forwarding in case of "no answer"
*61PhoneNumber#	- Register and activate divert on no answer to PhoneNumber
##61#	- Unregister divert on no answer
*61#	- Activate no answer calls divert
#61#	- Deactivate no answer calls divert
*#61#	- Check status of divert on no answer

Configure call forwarding in case of "not available"
*62PhoneNumber#	- Register and activate divert on not reachable
##62#	- Unregister divert on not reachable
*62#	- Activate divert on not reachable
#62#	- Deactivate divert on not reachable
*#62#	- Check status of divert on not reachable

Divert calls if your line is "busy"
*67PhoneNumber#	- Register and activate divert on busy
##67#	- Unregister divert on busy
*67#	- Activate divert on busy
#67#	- Deactivate divert on busy
*#67#	- Check status of divert on busy all call types
#6711#	- Check status of divert on busy voice calls
#6713#	- Check status of divert on busy fax calls
#6725#	- Check status of divert on busy data calls

All outgoing calls barring
*33code#	- Activate barr all outgoing calls (for code see "Safety" above)
#33*code#	- Deactivate barr all outgoing calls
*#33#	- Check status of barr all outgoing calls

Activate barr all calls
*330code#	- Activation Barr all calls
#330*code#	- Deactivate Barr all calls
#330code#	- Check status of barr all calls

Barr all outgoing international calls
*331code#	- Turn On Barr all outgoing international calls
#331*code#	- Turn OFF Barr all outgoing international calls
#331code#	- Check status of barr all outgoing international calls

GSM codes for barring all outgoing international calls except home country
*332code#	- Barr all outgoing international calls except home country Activate
#332*code#	- Barr all outgoing international calls except home country Deactivate
#332code#	- Check status of barr all outgoing international calls except home country

Activate barr all outgoing calls
*333code#	- Turn On Barr all outgoing calls
#333*code#	- Turn OFF Barr all outgoing calls
*#333#	- Check status of barr all outgoing calls

All incoming calls barring
*35code#	- Activation Barr all incoming calls
#35*code#	- Deactivate Barr all incoming calls
*#35#	- Check status of barr all incoming calls

Activate barr all incoming calls when roaming
*351code#	- Activation Barr all incoming calls when roaming
#351*code#	- Deactivate Barr all incoming calls when roaming
*#351#	- Check status of barr all incoming calls when roaming

Barr all incoming calls
*353code#	- Activate all incoming calls Blocking
#353*code#	- Deactivate all incoming calls Blocking
*#353#	- Check status of Blocking all incoming calls

Thomas Nilan
Smartphone Expert

Thomas Nilan is a mobile phone expert with in-depth knowledge of the Android and iOS operating systems, who understands the settings of various hidden features that allow you to expand the capabilities of your smartphone, as well as get information about what is going on inside the phone for future repairs. He is an authority in his field, which has allowed him to become a ghostwriter for several technology publications, and he enjoys writing small mobile applications for testing smartphones.

User questions and comments about secret codes ZTE Blade A20

	Wjzelu-Byc	March 04, 2024
	The Android v9.0 operating system is smooth and responsive, with a great camera setup and long battery life. The design is solid and the screen is vibrant. Great value overall.
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