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Flash firmware on MaxCom Comfort MK399

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How to flash MaxCom Comfort MK399?


Why reinstall the firmware?

Errors begin to appear in the Android operating system.

Some installed applications stop opening.

Many programs from the Play Market do not work.

The phone restarts by itself for no reason.

The phone is slow.

You are not satisfied with the functionality of the stock firmware.





Where can I find the firmware?

On the official website of the phone manufacturer.

On sites where third-party developers post custom operating systems.


What should be done before installing the firmware?

Create a backup copy of user data and transfer it to your computer.

Insert your SD card into your phone. It must have enough memory to fit the firmware.

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 from the Play Store on your phone. And run this application.

When you start the application for the first time, you must consent to future manipulations, as well as consent to granting the application Superuser rights. Check the checkboxes and press the 'OK' button.

On the next screen, select 'TWRP FLASH' and give the application root rights.

TWRP

On the main screen of the application, the 'Select Device' drop-down list is available, in which you need to find and select the device model for installing the recovery.

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.

Click the 'FLASH TO RECOVERY' button and confirm your choice, click 'OK' in the question window.

After the burn process is complete, the message 'Flash Completed Succsessfuly!' appears. Click 'OK'. The TWRP installation procedure can be considered complete..

Transfer the necessary files to the SD memory card. Using a PC or laptop card reader, it will be much faster.

Insert a SD memory card into the phone.

To reboot in recovery, it is convenient 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. We open the menu, select the 'Reboot' item, and then tap on the 'REBOOT RECOVERY' button. The phone will reboot into the recovery environment automatically.





Firmware via TWRP

TWRP

Before flashing, you need to clear the 'Cache' and 'Data' sections, press 'WIPE' on the main screen. This will delete all user data from the device, but avoid a wide range of software errors and other problems.

Everything is ready to start flashing. Press the 'Install' button.


TWRP

The file selection screen appears. At the very top is the 'Storage' button, select the location where the firmware file is located.

Select the storage to which the files were copied.



TWRP

Select the firmware file and click on it. A screen opens with a warning about possible negative consequences, as well as the item 'Zip signature verification'. This item should be checked by placing a cross in the check-box, which will avoid using damaged files when writing to the phone's memory sections.

The procedure for writing files to the device's memory will begin, accompanied by the appearance of inscriptions in the log field and the completion of the progress bar.

The completion of the installation procedure is indicated by the inscription 'Successful'.





Summary: OS: KaiOS 2.5; Processor: Spreadtrum SC9820E; Processor clock: 1.20 GHz; Number of cores: 2; GPU: ARM Mali-T820 MP1; RAM: 512 MB; Internal memory: 4 GB; Memory cards: yes; microSD, microSDHC, microSDXC (up to 32 GB); Display: Color / TFT; 64k colors; 240 x 320 px (2.80") 143 ppi; ~39.4% screen-to-body ratio; Additional display: Color / TFT; 64k colors; 128 x 128 px (1.44"); Display protection: yes; Photo matrix: 2 Mpx; Resolution: 1600x1200 px; Flash: yes; A-GPS: yes; GPS module: yes; Bluetooth: yes; EDGE: yes; GPRS: yes; IrDA: yes; NFC: yes; USB: yes; WAP: yes; WiFi: yes v802.11 b/g/n; WiFi frequencies: 2.4 GHz; Hotspot WiFi: yes; Audio Jack: 3.5 mm; Java: yes; MP3: yes; Polyphony: ye ...

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