Flash firmware on HTC Desire 620 Dual SIM
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How to flash HTC Desire 620 Dual SIM?
Why reinstall the firmware?
Errors periodically appear in the Android operating system.
Some installed applications stop opening.
Many programs from the Play Market do not work.
The phone turns off for no apparent reason.
The phone started to work slowly.
You have decided to try a different version of Android.
Where can I find the firmware?
On the phone manufacturer's website.
On sites where third-party developers post custom operating systems.
What should be done before installing the firmware?
Back up your contacts and user data and transfer it to your computer.
Insert SD card. An SD card is needed to write firmware to it.
Find out the exact model of your smartphone.
Fully charge your phone. If the battery runs out during boot, the device will no longer turn on.
Download archive with Firmware. Place it on the SD card.
Installing TWRP Recovery
Install the Official TWRP App via the Play Market. And run this application.
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.
Going to the next screen, select the item 'TWRP FLASH' and provide the application with root-rights.
On the main screen of the application, click on the 'Select Device' drop-down list, and select your phone model.
After selecting a device, the program redirects the user to a web page to download the corresponding image file of the modified recovery environment. Download the suggested *.img file.
When the download is finished, you need to return to the main screen of the Official TWRP App and click on the 'Select a file to flash' button. Select the file downloaded in the previous step.
Now 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.
Transfer the necessary files to the SD memory card. Using a PC or laptop card reader, it will be much faster.
Insert a memory card into the device.
To reboot into recovery, you need to use a special item in the Official TWRP App menu, accessible by pressing the button with three stripes in the upper left corner of the main screen of the application. Open the menu and select the 'Reboot' item, 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 many problems. press 'WIPE' on the home screen.
Press the 'Install' button to start the flashing.
The file selection screen appears. At the very top there is a 'Storage' button for selecting an SD card.
Select the storage to which the files were copied.
Select the firmware file 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 damaged files during recording.
The procedure for flashing the phone will begin, accompanied by the appearance of inscriptions in the log field and the movement of the progress bar.
After completing the installation procedure, a 'Successful' message appears on the screen.
Summary: Smart Phone OS: Android; Smart Phone OS ver.: 4.4; Shape: Bar; SIM: Dual SIM (Micro-SIM), Dual Standby; Processor Speed: 1.2GHz Dual-Core; Internal Storage: 8GB; RAM: 1GB; External Storage: micro SD up to 128GB; Battery life: ; Screen Size: 5inch (~294 ppi pixel density); Resolution: 1280x720; Touch Screen: yes; Screen Type: Capacitive; Pixels: 8mp / 5mp (front); Flash: yes; Image Stabilization: ; Waterproof: ; GPS: yes; Dimensions (WxHxD): 72.7 x 150.1 x 9.6 mm; Weight: 160g; ...
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