Flash firmware on Panasonic P91
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How to flash Panasonic P91?
Why reinstall the firmware?
Errors periodically appear in the Android operating system.
Some applications will not open.
Many applications from the Play Market do not start.
The phone restarts for no 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 official website of the manufacturer.
On Internet resources where users post custom or official OS.
What should be done before installing the firmware?
Back up your phone's user data.
Insert your SD card into your phone. An SD card is needed to write firmware to it.
Find out the exact model of your smartphone.
Charge your phone fully. If the battery runs out during boot, the device will no longer turn on. It will be difficult to restore it.
Download archive with Firmware.
Installing TWRP Recovery
Download the Official TWRP App from the Play Market. And install it.
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.
In 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 the phone, the program will redirect the user to a web page to download the corresponding image file of the modified recovery environment. Download the proposed *.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. Then we tell the program the path where the file loaded in the previous step is located.
Click the 'FLASH TO RECOVERY' button and confirm your choice, click 'OK' in the question window.
When the message 'Flash Completed Succsessfuly!' appears. Click 'OK'. The TWRP installation procedure is now complete.
Copy the necessary files to the SD memory card. Using a PC or laptop card reader.
Insert a 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. 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 errors in the software, as well as other problems. Press 'WIPE' on the home screen.
Press the 'Install' button to start the flashing.
The file selection screen is displayed. At the very top is the 'Storage' button, which allows you to switch between types of memory.
Select the location where you copied the files.
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 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 completing the installation procedure, a 'Successful' message appears on the screen.
Summary: Performance: Quad core; Display: 5.0" (12.7 cm); Storage: 16 GB; Camera: 8 MP; Battery: 2500 mAh; Ram: 1 GB; Sensors: Light sensor, Proximity sensor, Accelerometer; Quick charging: No; Operating system: Android v7.0 (Nougat); Sim slots: Dual SIM, GSM GSM; Sim size: SIM1: Micro SIM2: Micro; Network: 4G: Available 3G: Available, 2G: Available; Loudspeaker: Yes; Fm radio: Yes; Audio jack: 3.5 mm; Chipset: MediaTek MT6737; Graphics: Mali-T720 MP2; Processor: Quad core, 1.1 GHz, Cortex A53; Architecture: 64 bit; Ram: 1 GB; Thickness: 10.1 mm; Width: 72.4 mm; Weight: 161 grams; Height: 144.7 mm; Colours: Blue, Gold, Sand Black; Display type: TFT; Screen to body ratio ...
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