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HTC U21 Plus secret codes


 Specification HTC U21 Plus 
 Root HTC U21 Plus 
 Unlock HTC U21 Plus 
 Firmware HTC U21 Plus 
 Developer Mode HTC U21 Plus 
 Bypass Lock Screen HTC U21 Plus 
 Bypass FRP HTC U21 Plus 
 Opinions HTC U21 Plus 
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HTC U21 Plus



OS: Android v11

CPU: Qualcomm SDM765 Snapdragon 765G (7 nm)
RAM: 8 GB
Display: 6.8 inches
Camera: 48 MP 8 MP 2 MP 2 MP
Battery: 5000 mAh


Secret codes for HTC U21 Plus

*#06#- IMEI (International Mobile Equipment Identity) number
*#*#3424#*#*- Engineering Mode
*#*#3646633#*#* or *#*#54298#*#*- Engineering Mode (for smartphones based on MTK processor)
*#*#4636#*#*- Displaying Phone Information (Phone, Battery, WiFi and other)
*#*#225#*#*- Upcoming calendar events
*#*#426#*#*- Information about the connection with Google Play Services
*#*#759#*#*- RLZ Debug UI (Device ID, Activation Status, Some Ping Stuff, and few other things)
*#*#36245#*#*- Email debug information
*#*#8255#*#*- Used to launch G Talk Service Monitor
*#*#64663#*#*- Hardware Test (Version, Sensors, Sim, WLAN, Bluetooth, Battery, OTG, Radio, Speakers)
*#*#7780#*#*- Used for a factory data reset.
*2767*3855#- Factory formatting
*#*#232338#*#*- Displays Wi-Fi Mac-address
*#*#34971539#*#*- Shows complete 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
*#*#273283*255*663282*#*#*- For a quick backup to all your media files
*#*#1575#*#*- Different GPS Test Code
*#*#197328640#*#*- Enabling test mode for service activity
*#*#0283#*#*- Packet Loopback test
*#0228#- battery calibration
*#*#232339#*#* OR *#*#526#*#*- Wireless Lan Tests
*#*#0*#*#*- LCD display test Code
*#*#3264#*#*- To display RAM Number
*#*#1111#*#*- FTA Software version
*#*#2664#*#*- Touch-Screen test
*#*#0588#*#*- Proximity sensor test
*#*#8351#*#*- Enables voice dialing logging mode
*#*#232331#*#*- Bluetooth Test Mode
*#*#232337#*#- Displays bluetooth device address
*#*#7262626#*#*- Field test
*#*#0289#*#* OR *#*#0673#*#*- Audio test
*#*#0842#*#*- Device test (vibration test and backlight test)
*#*#2663#*#*- Display device's touch-screen version
*#*#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 HTC U21 Plus

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 call waiting
#43#- Deactivate call waiting
*#43#- Check status of call waiting
USSD Codes For Call Forwarding
##002#- Disable All Call Forwarding
**004*PhoneNumber#- Set all configured call diversions to PhoneNumber
##004#- Unregister all configured call diversions
Call Forward All
**21*PhoneNumber#- Register and activate divert all calls to PhoneNumber
##21#- Unregister divert all calls
*21#- Activate divert all calls
#21#- Deactivate divert all calls
*#21#- Check status of divert all calls
Set call 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 divert on no answer
#61#- Deactivate divert on no answer
*#61#- Check status of divert on no answer
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
Set barring of 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
Blocking all calls
**330*code#- Activate barr all calls
#330*code#- Deactivate barr all calls
*#330*code#- Check status of barr all calls
USSD Codes For Barring all outgoing international calls
**331*code#- Activate barr all outgoing international calls
#331*code#- Deactivate barr all outgoing international calls
*#331*code#- Check status of barr all outgoing international calls
All outgoing international calls barring except home country
**332*code#- Activate barr all outgoing international calls except home country
#332*code#- Deactivate barr all outgoing international calls except home country
*#332*code#- Check status of barr all outgoing international calls except home country
Blocking all outgoing calls
**333*code#- Activate barr all outgoing calls
#333*code#- Deactivate barr all outgoing calls
*#333#- Check status of barr all outgoing calls
Set barring of all incoming calls
**35*code#- Activate barr all incoming calls
#35*code#- Deactivate barr all incoming calls
*#35#- Check status of barr all incoming calls
Blocking all incoming calls when roaming
**351*code#- Activate 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
USSD Codes For Barring all incoming calls
**353*code#- Activate barr all incoming calls
#353*code#- Deactivate barr all incoming calls
*#353#- Check status of barr all incoming calls


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