Flash firmware on Karbonn touch A20
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How to flash Karbonn touch A20?
Why reinstall the firmware?
Errors constantly appear in the Android OS.
Some installed applications do not open.
Many programs from the Play Market do not start.
The phone turns off for no apparent reason.
The phone started to work slowly.
You are not satisfied with the possibilities of the stock firmware.
Where can I find the firmware?
On the official website of your phone manufacturer.
On specialized services on which developers lay out custom or official OS.
What should be done before installing the firmware?
Back up your contacts and user data and transfer it to your computer.
Insert your SD card into your phone. An SD card is needed to write firmware to it.
Determine your smartphone model.
Fully charge your device. If the battery runs out during the firmware, the device will no longer turn on.
Download the archive with Firmware and place it on the SD card.
Installing TWRP Recovery
Download the Official TWRP App to your phone from the Play Market. And install this app.
When you start the application for the first time, you must agree to install the firmware, as well as agree to grant the application Superuser rights and click the 'OK' button.
After moving to the next screen, you need to select the 'TWRP FLASH' item and give the application root rights.
On the main screen of the application, click 'Select Device', and select your phone model.
After selecting a device, the application will direct the user to a web page to download the appropriate modified recovery environment image file. Download the suggested *.img file.
When the file is loaded, return to the main screen of the Official TWRP App and press the 'Select a file to flash' button. Select the file downloaded in the previous step.
Press the 'FLASH TO RECOVERY' button and confirm your choice, press 'OK'.
When the message 'Flash Completed Succsessfuly!' appears. Click 'OK'. The TWRP installation procedure is now complete.
Write the firmware and other necessary files to the SD card. Using a PC or laptop card reader, it will be much faster.
Insert a SD memory card into the phone.
To reboot into recovery, you need to enter the menu accessible by pressing the button with three stripes in the upper left corner of the main screen of the application. Select 'Reboot' and then click on the 'REBOOT RECOVERY' button.
Firmware via TWRP
Before flashing, you need to delete all user data from the phone, this will avoid errors in the software, as well as other problems. Press 'WIPE' on the home screen.
You can start flashing. Click the 'Install' button.
On the file selection screen, at the very top there is a 'Storage' button for selecting an SD card.
Select the location where you copied the files. Press the 'OK' button.
Find the file we need and click on it. A screen opens with a warning about possible negative consequences, you need to check the item 'Zip signature verification', which will avoid using corrupted files when writing to the phone's memory sections.
The procedure for flashing the phone will begin, this is accompanied by the appearance of inscriptions in the log field and the movement of the progress bar.
After the firmware installation procedure is completed, the 'Successful' message appears on the screen.
Summary: Sim Type: GSM+GSM; Dual Sim: Yes; Type: Color IPS screen; Touchscreen: Yes, with Multitouch; Size: 5 inches, 480 x 854 pixels; PPI: ~ 196 PPI; RAM: 512 MB; Internal memory: 4 GB inbuilt; Card Slot: Yes, upto 32 GB; GPRS: Yes; EDGE: Yes; 3G: Yes; Wi-Fi: Yes, with wifi-hotspot; Bluetooth: Yes, v3.0; USB: Yes, microUSB v2.0; GPS: Yes, with A-GPS Support; Sensors: Accelerometer; 3.5mm Headphone Jack: Yes; Camera: Yes, 8 MP with autofocus; Flash: LED; Front Camera: Yes, VGA (0.3 MP); Operating System: Android, v4.2 (Jelly Bean); Processor: 1.2 GHz, Dual Core Processor; FM Radio: Yes; Size: 2000 mAH, Li-ion Battery; ...
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