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OPPO F21 secret codes


 Specification OPPO F21 
 Root OPPO F21 
 Unlock OPPO F21 
 Firmware OPPO F21 
 Developer Mode OPPO F21 
 Bypass Lock Screen OPPO F21 
 OPPO F21 Factory Reset 
 Bypass FRP OPPO F21 
 Screenshot OPPO F21 

OPPO F21


OS: Android 10, ColorOS 7.2

CPU: Octa-core (2x2.0 GHz Cortex-A76, 6x2.0 GHz Cortex-A55)
RAM: 8 GB
Display: 6.5 inches
Camera: 16 MP (wide), 8 MP (ultrawide), 2 MP (depth)
Battery: Li-Po 4,500 mAh, Fast charging 64W




OPPO F21 smartphone runs on Android 10 ColorOS 7.2 operating system. The phone is powered by Octa-core (2x2.0 GHz Cortex-A76 6x2.0 GHz Cortex-A55) processor. It has 8 GB. Internal storage options which can be extended with the help of 128 GB. The smartphone has a IPS LCD providing. The smartphone is fueled with a Li-Po 4,500 mAh Fast charging 64W. The main camera of the smartphone consists of a 16 MP (wide) 8 MP (ultrawide) 2 MP (depth). The sensors include Fingerprint (side-mounted), accelerometer, proximity . Connectivity features in the smartphone include, Yes, with A-GPS, GLONASS, GALILEO, BDS, NFC, 3.5 mm Jack and more. It measures Octa-core (2x2.0 GHz Cortex-A75 6x1.8 GHz Cortex-A55)

Secret codes for OPPO F21

*#06#- IMEI (International Mobile Equipment Identity) number
*#*#3646633#*#* or *#*#54298#*#*- Engineering Mode (for smartphones based on MTK processor)
*#*#4636#*#*- Display information about Phone, Battery and Usage statistics
*#*#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
*#12580*369#- Software and hardware info
*#0283#- Audio Loopback Control
#7465625*638*#- Insert Network Lock Key Code
*#*#759#*#*- RLz Debug UI system hidden menu.
*#*#36245#*#*- Email debug information
*#*#8255#*#*- Google Talk Service Monitor in Android mobile phones will monitor Google Talk host address and port, your Google JID, your device ID, GTalk connection status, your connection history
*#*#64663#*#*- Hardware Test (Version, screen, led, sound, vibrate, all sensors)
*#*#7780#*#*- Android factory reset code.
*2767*3855#- Reinstall factory ROM
*#*#232338#*#*- Displays Wi-Fi Mac-address
*#*#34971539#*#* or *#34971539#- Display full information about the camera.
*#*#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
*#*#273283*255*663282*#*#*- 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 test
*#*#3264#*#*- Show Ram version
*#*#1111#*#*- FTA Software version
*#*#2664#*#*- Touch-Screen test
*#*#0588#*#*- Proximity sensor test
*#*#8351#*#*- Enables voice dialing logging mode
*#*#232331#*#*- Show Bluetooth Test Mode
*#*#232337#*#- Shows Bluetooth device address in OPPO F21
*#*#7262626#*#*- Field test
*#*#0289#*#* OR *#*#0673#*#*- Audio test
*#*#0842#*#*- General Test Mode (vibration test and backlight test)
*#*#2663#*#*- Touchscreen Accuracy Test
*#*#44336#*#*- Displays Build time and change list number
*#*#4986*2650468#*#*- PDA, Phone, Hardware, RF Call Date firmware info
*#*#8350#*#*- Disables voice dialing logging mode
*#*#2222#*#*- FTA Hardware verion


GSM codes for OPPO F21



Change code
**03*old code*new code*new code#            
                  - Change code for call barring
**04*old PIN code*new PIN *new PIN#            
                  - Change SIM Card PIN code
**042*old PIN2 code*new PIN2*new PIN2#            
                  - Change SIM Card PIN2 code
**05*PUK code*new PUK*new PUK#            
                  - Change SIM Card PUK code
**052*PUK2 code*new PUK2*new PUK2#            
                  - Change SIM Card PUK2 code
Call waiting
*43#- Activate waiting call
#43#- Deactivate waiting call
*#43#- Check status of call waiting
GSM codes for Call Forwarding
##002#- Disable All Call Forwarding
**004*PhoneNumber#- Set all configured call diversions to PhoneNumber
##004#- Unregister all configured call diversions
Set call forwarding
*21*PhoneNumber#- Register and activate divert all calls to PhoneNumber
##21#- Unregister divert all calls
*21#- Divert all calls Enable
#21#- Divert all calls Disable
*#21#- Check status of divert all calls
Forwarding in case of "no answer"
**61*PhoneNumber#- 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"
**62*PhoneNumber#- 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
Diversion in case of "busy"
**67*PhoneNumber#- 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
*#67*11#- Check status of divert on busy voice calls
*#67*13#- Check status of divert on busy fax calls
*#67*25#- Check status of divert on busy data calls
Barr all outgoing calls
**33*code#- 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
**330*code#- Activation Barr all calls
#330*code#- Deactivate Barr all calls
*#330*code#- Check status of barr all calls
Activate or deactivate barring all outgoing international calls
**331*code#- Barr all outgoing international calls Activate
#331*code#- Barr all outgoing international calls Deactivate
*#331*code#- Check status of barr all outgoing international calls
GSM codes for barring all outgoing international calls except home country
**332*code#- Barr aall outgoing international calls except home country Enable
#332*code#- Barr all outgoing international calls except home country Disable
*#332*code#- Check status of barr all outgoing international calls except home country
Activate barr all outgoing calls
**333*code#- Barr all outgoing calls Activate
#333*code#- Barr all outgoing calls Deactivate
*#333#- Check status of barr all outgoing calls
Barr all incoming calls
**35*code#- 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
**351*code#- 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
Activate or deactivate barring all incoming calls
**353*code#- 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 OPPO F21



userKudNaxoMarch 14, 2024
The phone has a sleek design with a sturdy build. The screen is vibrant and sharp. Performance is smooth and responsive. The camera takes great photos. Battery life is impressive. Great value for money.
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