| Specification Vivo Y21L |
| Hard reset Vivo Y21L |
| Root Vivo Y21L |
| Unlock Vivo Y21L |
| Firmware Vivo Y21L |
| Developer Mode Vivo Y21L |
| Bypass Lock Screen Vivo Y21L |
| Vivo Y21L Factory Reset |
| Bypass FRP Vivo Y21L |
| Screenshot Vivo Y21L |
|
OS: Android v5.1 (Lollipop) CPU: Quad core, 1.2 GHz, Cortex A53 RAM: 1 GB Display: 4.5 inches (11.43 cm) Battery: 2000 mAh |
| *#06# | - IMEI (International Mobile Equipment Identity) number |
| *#*#3646633#*#* or *#*#54298#*#* | - Engineering Mode (for smartphones based on MTK processor) |
| *#*#4636#*#* | - Phone information (Phone, Battery, WiFi and other) |
| *#*#225#*#* | - Calendar Storage, show the number events in your calendar |
| *#*#426#*#* | - Debug information for Google Play service. |
| *#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#*#* | - Access to Rlz Debug Ul |
| *#*#36245#*#* | - Email debug information |
| *#*#8255#*#* | - This code can be used to launch GTalk Service Monitor |
| *#*#64663#*#* | - Mobile phones Hardware Test |
| *#*#7780#*#* | - Return to factory setting. |
| *2767*3855# | - Full reset EEROM. |
| *#*#232338#*#* | - Displays Wi-Fi Mac-address |
| *#*#34971539#*#* or *#34971539# | - Display 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#*#* | - Test GPS |
| *#*#197328640#*#* | - Enabling test mode for service activity |
| *#*#0283#*#* | - Packet Loopback test |
| *#0228# | - battery calibration |
| *#*#232339#*#* OR *#*#526#*#* | - Wireless Lan Tests |
| *#*#0*#*#* | - LCD display test |
| *#*#3264#*#* | - Show Ram version |
| *#*#1111#*#* | - FTA Software version |
| *#*#2664#*#* | - Touch-Screen test |
| *#*#0588#*#* | - Proximity sensor test |
| *#*#8351#*#* | - Enables voice dialing logging mode |
| *#*#232331#*#* | - Check Bluetooth |
| *#*#232337#*# | - Bluetooth address |
| *#*#7262626#*#* | - Field test |
| *#*#0289#*#* OR *#*#0673#*#* | - Audio test |
| *#*#0842#*#* | - Vibration test and BackLight test |
| *#*#2663#*#* | - Touch-screen version Vivo Y21L |
| *#*#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 |
| 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# | - Enable call waiting on your phone |
| #43# | - Disable call waiting on your phone |
| *#43# | - Check status of call waiting |
| Set up 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# | - Activation Divert all calls |
| #21# | - Deactivate Divert all calls |
| *#21# | - Check status of divert all calls |
| Configure 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# | - Enable Divert on no answer calls on your phone |
| #61# | - Disable divert on no answer calls on your phone |
| *#61# | - Check status of divert on no answer |
| Divert calls if your line is "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 |
| Activate or deactivate 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 |
| USSD Codes For Barring all calls | |
| **330*code# | - Enable barr all calls |
| #330*code# | - Disable Barr all calls |
| *#330*code# | - Check status of barr all calls |
| GSM codes for barring all outgoing international calls | |
| **331*code# | - Barr all outgoing international calls Enable |
| #331*code# | - Barr all outgoing international calls Disable |
| *#331*code# | - Check status of barr all outgoing international calls |
| Block all outgoing international calls except home country | |
| **332*code# | - Activation 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 |
| USSD Codes For Barring all outgoing calls | |
| **333*code# | - Barr all outgoing calls Enable |
| #333*code# | - Barr all outgoing calls Disable |
| *#333# | - Check status of barr all outgoing calls |
| Activate or deactivate barring all incoming calls | |
| **35*code# | - Enable barr all incoming calls |
| #35*code# | - Disable Barr all incoming calls |
| *#35# | - Check status of barr all incoming calls |
| USSD Codes For Barring all incoming calls when roaming | |
| **351*code# | - Enable barr all incoming calls when roaming |
| #351*code# | - Disable Barr all incoming calls when roaming |
| *#351# | - Check status of barr all incoming calls when roaming |
| GSM codes for barring all incoming calls | |
| **353*code# | - Enable Blocking all incoming calls on your phone |
| #353*code# | - Disable Block all incoming calls on your phone |
| *#353# | - Check status of Blocking all incoming calls |
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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. | |
 | Tanimesh Dash | June 11, 2021 |
| *#0228# is not working and my battery is draining very quickly Please please tell the solution | ||
| Reply | ||
| Guru | July 11, 2021 |
| How to enable VoLTE option in vivo y21l | ||
| Reply | ||
| Guru | July 11, 2021 |
| How to enable VoLTE on vivo y21l | ||
| Reply | ||
| Mlmasi_ | March 11, 2024 |
| The design is sleek and the build quality is good. The screen is clear and bright. Performance is smooth. The camera takes decent photos. Battery life is average. Good value for money. | ||
| Reply | ||
