| Specification BLU C4 |
| Hard reset BLU C4 |
| Root BLU C4 |
| Unlock BLU C4 |
| Firmware BLU C4 |
| Developer Mode BLU C4 |
| Bypass Lock Screen BLU C4 |
| BLU C4 Factory Reset |
| Bypass FRP BLU C4 |
| Screenshot BLU C4 |
|
OS: Android 8.1 Oreo (Go edition) CPU: Quad-core 1.3 GHz Display: 4" inc Camera: 5 MP,
Single |
| *#06# | - IMEI number is a unique serial number |
| *#*#3646633#*#* or *#*#54298#*#* | - Engineering Mode (for smartphones based on MTK processor) |
| *#*#4636#*#* | - This code can be used to get some interesting information about BLU C4 (Phone, Battery, WiFi and other) |
| *#*#225#*#* | - This code show the number of festivities and events in your calendar |
| *#*#426#*#* | - This code show Google Play |
| *#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 (Device ID, Activation Status, Some Ping Stuff, and few other things) |
| *#*#36245#*#* | - Access Email debug info Email |
| *#*#8255#*#* | - To launch Google Talk service monitor |
| *#*#64663#*#* | - Access Hardware Test (Sensors, Bluetooth, Battery, Speakers) |
| *#*#7780#*#* | - Used for a factory data reset. |
| *2767*3855# | - The firmware of the device is completely reinstalled |
| *#*#232338#*#* | - Show MAC address of Wi-Fi network |
| *#*#34971539#*#* or *#34971539# | - 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#*#* | - Another GPS test |
| *#*#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#*#* | - Ram version |
| *#*#1111#*#* | - FTA Software version |
| *#*#2664#*#* | - Touch-Screen test |
| *#*#0588#*#* | - Test the proximity sensor |
| *#*#8351#*#* | - Enables voice dialing logging mode |
| *#*#232331#*#* | - Bluetooth test |
| *#*#232337#*# | - Check 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 |
| 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 | |
| GSM codes for Call waiting | |
| *43# | - To turn Call Waiting On for all calls |
| #43# | - To turn Call Waiting OFF for all calls |
| *#43# | - Check status of call waiting |
| Call Forwarding | |
| ##002# | - Disable All Call Forwarding |
| **004*PhoneNumber# | - Set all configured call diversions to PhoneNumber |
| ##004# | - Unregister all configured call diversions |
| USSD Codes For Call Forward All | |
| *21*PhoneNumber# | - Register and activate divert all calls to PhoneNumber |
| ##21# | - Unregister divert all calls |
| *21# | - Enable Divert all calls on your phone |
| #21# | - Disable Divert all calls on your phone |
| *#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# | - To turn Divert On no answer calls |
| #61# | - To turn Divert OFF for no answer calls |
| *#61# | - Check status of divert on no answer |
| Set 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 |
| Set up call forwarding 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 |
| Blocking 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 |
| Set barring of all calls | |
| **330*code# | - Enable Barr all calls on your phone |
| #330*code# | - Disable Barr all calls on your phone |
| *#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 |
| USSD Codes For Barring all outgoing international calls except home country | |
| **332*code# | - Enable Barr all outgoing international calls except home country on your phone |
| #332*code# | - Disable Barr all outgoing international calls except home country on your phone |
| *#332*code# | - Check status of barr all outgoing international calls except home country |
| Set barring of 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 |
| Blocking all incoming calls | |
| **35*code# | - Enable Barr all incoming calls on your phone |
| #35*code# | - Disable Barr all incoming calls on your phone |
| *#35# | - Check status of barr all incoming calls |
| Set barring of all incoming calls when roaming | |
| **351*code# | - Enable Barr all incoming calls when roaming on your phone |
| #351*code# | - Disable Barr all incoming calls when roaming on your phone |
| *#351# | - Check status of barr all incoming calls when roaming |
| USSD Codes For Barring all incoming calls | |
| **353*code# | - To turn Block On for all incoming calls |
| #353*code# | - To turn Block OFF for all incoming calls |
| *#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. | |
 | Plwucu | March 09, 2024 |
| The camera quality is decent, but lacks advanced features. Battery life is average and charging speed is slow. The phone is basic, but functional. Screen size and resolution are small. Performance is sluggish. Operating system is outdated. Call quality is satisfactory. Affordable price point. | ||
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