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Flash firmware on DNS S4702M

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How to flash DNS S4702M?


Why reinstall the firmware?

Errors in the operation of the Android OS begin to appear.

Some installed applications do not open.

Many programs from the Play Market do not work.

The phone turns off for no apparent reason.

The phone began to slow down a lot.

You want to update your firmware.





Where can I find the firmware?

On the official Internet resource of the phone manufacturer.

On sites where developers post 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 an SD card into your phone to write the firmware to it.

Remember your smartphone model.

Fully charge your phone battery.

Download archive with Firmware. 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 need to give consent to future manipulations, as well as to give consent to granting the application Superuser rights and click the 'OK' button.

After moving to the next screen, select the 'TWRP FLASH' item and provide the application with root rights.

TWRP

On the main screen of the application, select 'Select Device', and find 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.

After downloading the image file, 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 can be considered complete.

Write the firmware to the SD card. Using a PC or laptop card reader.

Insert a SD memory card into the phone.

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. We open the menu, select the 'Reboot' item, and then click 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. You will delete all user data from the phone, this will avoid software errors and other problems.

Now you can start flashing. Press the 'Install' button.


TWRP

The file selection screen appears. At the very top there is a 'Storage' button for selecting an SD card.

Select the location where the files were copied. Press the 'OK' button.



TWRP

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 writing files to the phone's memory will begin, this is accompanied by the appearance of inscriptions in the log field and the movement of the progress bar.

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





Summary: Band: GSM 900/1800/1900, 3G; Type: smartphone; Platform: Android; Enclosure type: classic; Housing material: metal and plastic; The number of SIM-cards: 2; Mode of operation of multiple SIM cards: alternating; Dimensions (WxHxT): 69x132x9 mm; Screen type: color IPS, 16.78 million colors, touch; Touch screen type: multitouch capacitive; Diagonal: 4.7 inch.; Image size: 720x1280; Ringtones type: polyphonic, MP3 ringtones; Vibrating alert: yes; Camera: 8 million pixels., the built-in flash; Camera options: autofocus; Recording movies: yes; Front camera: yes, 1.9 million pixels.; Audio: MP3, FM-radio; Recorder: yes; Headphone Jack: 3.5 mm; Interfaces: U ...

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