Tuesday 19 May 2015

Network Not Available after Flashing with New ROM - Lenovo a536

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It was the first and only issue i came across after flashing my Lenovo a536 with new stock ROM. When i finished flashing and rebooted my phone, everything was working quite normal except the SIM cards. The device was detecting both the SIM cards but it was not able to catch the network. Even though i could use SIM 1 network sometimes after restarting the phone again and again, SIM 2 was totally dead. Later when i cross checked the phone totally, i came to know that the problem was 'Invalid IMEI'. When i slide down the notification bar, it was showing 'Invalid IMEI' for both the SIM cards. When i checked the IMEI status of my device using the code *#06#, it was showing again Invalid IMEI.
This is a common issue occurs after installing a custom ROM. If the ROM is with some errors of some issues, it may occur. The solution is simple but the problem is quite big because, without a proper IMEI, your phone is just a device, not a communication device. In the the below article i have explained how to solve Invalid IMEI problem.

How to Solve Invalid IMEI issues after Flashing with New ROM

Thanks for reading. Feel free to comment for any doubts.


How To Flash Lenovo a536 with Stock ROM using SP Flash Tool

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Recently i got a notification on my Lenovo a536 saying system update(VIBE official update) is available. So as usual i kept for update, the update package was downloaded and phone booted into startup and started upgrading. Suddenly the upgrade got stuck and it was showing only one thing "No Command" on the screen with a Android Bot image. Without knowing what it was, i formatted the phone from startup menu. Later i came to know, my phone is dead. So i had to flash it with stock ROM again. I was not able to flash it with any ROM because my device was not rooted. So here is how i did it finally.

Requirements:

So once you've downloaded all the files, follow the below steps. Remember to charge your phone to 30-60 Mins before you start.

Step 1: Unzipping

Unzip all the downloaded files and keep it in different folders.

Step 2: Install the drivers

 **This is a very important step. If the drivers are not up to date, nothing is gonna work**

Open the Device Manager in your PC.(Can be opened by typing Device Manager in start menu). Remove your phone battery, connect the phone to your PC/Laptop via USB cable. Make sure you use a good quality cable and the powerful port of your PC. Once you connect, your Device Manager will show up the connected device as Mediatek Preloader device.



 Right click on it and click update driver. Click Browse Computer and navigate to the USB VCOM unzipped folder.(The device may flash on the list for seconds and vanish and again appear. So right click on the device before it disappears.)

Step 2: Flash the ROM

Once you install the Driver, next you can Flash the device.

  • Remove the connection and put the battery back. Do not switch on the device. 
  • Open SP Flash Tool provided with the ROM package.(flash_tool.exe)

  • First Go to Options>>Options>>Download>>Check the box DA DL All with checksum.
  • Click on Scatter Loading and Choose the file MT6582_Android_scatter.txt in target_bin folder in the extracted file. I will add all the images to flash.

  • Change the Download only option to Firmware upgrade. and click on Download.

  • Now the Flash Tool will wait foe the device to connect. Now connect your device using USB cable with battery in but without switching on the phone. Download process will start.
  • Once it finishes you'll get a success screen as below.

  • That's it. You have successfully flashed your phone. Now you can Reboot your phone. It'll be same like before. You will be recieving the updates and once you update the system normally. Everything will be normal.


Possible Errors

Your Download process may get stopped due to many type of errors and many number of times. Still do not give up. If you're continuously getting error and the download process stops, try downloading without battery. (Remove the battery and connect the device with USB cable, during the above process.)

For any help, feel free to comment. :)


Stock ROM Download for Lenovo a536

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ROM Description

Build Number : A536_ROW_S147_140725
OS : 4.4.2 KitKat
Languages : Russian , Ukrainian, English, Arabic, Spanish, French, Chinese, Vietnamese, Indonesian, Malaysian, Thai
Google Applications : Included

Use SP Flash Tool for flashing. Read the article for for about How to Flash ROM using SP Flash Tool.

How to Root Lenovo a536 using King Root

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Lenovo A536 is a Android 4.4 Kitkat powered smartphone. And since it is Kitkat OS, usual Framaroot type rooting apps will not work. So here comes the solution. King root is china application using which you can root any Kitkat devices.
Since it is not an official app, the item is not available in Play Store. Instead you can download it from here. (Choose the download option for Android device).

Once you download, Install it on you device, Before you install make sure you have permission for unknown source apps install. It can be done by going to Settings>>Security>>Device Administration and check the box Unknown sources. (Refer the below image)
Once you install the app, Open it. It'll be written in Chinese, you actually dont need to mind. Just click on the middle of the screen. It'll take few moments to complete the process. Once you successfully root the screen will be flashed like below.
That's it. You have successfully rooted your Lenovo a536 Kitkat4.4. Now you'll be able to see King user also in the app tray.