Guide to Flash Rom on Lenovo A1900 using .pac file run on Spreadtrum chipset.

Flash or Install Stock Rom Lenovo A1900.  You can use this guide just for Lenovo A1900 which using Spreadtrum SC7730 chipset) Guidebelajar on this guide will show to you how to flashing android device on Lenovo A1900 with easy and simple step. Lenovo A1900 comes with IPS LCD capacitive touchscreen 16 M colors, 4.0 Inches wides, Android OS, v4.4.2 (KitKat), and supported with Spreadtrum SC7730 chipset, Quad-core 1,2 GHz CPU Cortex-A7, combined with 512 MB of RAM as their engine. And you can enjoy exciting 2 MP on main camera, And this devices released 2015, April.

Flashing in android is the same way like fresh install on the windows PC, So by perform a flash on Android you will give a new performance like a new phone. One reason that you should perform a flash your android is because your android get bootloop or when you failed to install Stock ROM Mod.

Do you know what is bootloop, Ok.. now I will explain to you what si bootloop. Some people say that bootloop is a problem that occured on an android system which the android system could not start up going to the homescreen menu. And it's happened is automatically return to the initial state on the first time when you turn on the Lenovo A1900. And the device will stop to display on the smartphone logo. 

Now, follow the isntruction list bellow, do it with your own risk.

Prepare Flash Lenovo A1900.

1. A computer with windows OS,
2. Original USB Cable Lenovo A1900


3. MTK Driver_Auto_Installer_v5.1453.03, Here
4. SPFlash Tool for windows Here 
5. Stock Rom Lollipop For Lenovo A1900. Here (you must be a registered user)
6. To ensure what is firmware used by your device now, you can check by go to Setting ->About -> Software Information ->Build Number.
7. Flashing & Servicing must be undertaken by qualified personnel only. 

Guide To Flash Lenovo A1900 On Spreadtrum Chipset Using .Pac File.

This is step to flash Android Smartphone Run On Spreadtrum Chipset Using .Pac File,

1. You need a computer with windows OS
2. Turn Off your android device.
3. Download appropriate Spreadtrum USB Driver for your android devices.(If needed), here
4. After you finish download spreadtrum USB driver, now install it on your computer. (you can skip this step if this driver already installed)


5. Download latest SPD Upgrade Tool sometimes this tool called with Spreadtrum Flash Tool. (Spreadtrum Upgrade tool R.2.9.2015) or you can find this tool on package.
6. When download is done. extract this tool on spesified folder on your computer.
7. After this tool extracted, you will able to see picture like shown below.

   

   Spreadtrum upgrade tool

8. Then, Double click on upgradedownload.exe to open Spreadtrum Flash Tool.

   

   Spreadtrum upgrade tool

9. When this tool is launched, now connect your android smartphone to your computer .

   

   Spreadtrum upgrade tool

10. Once your android is successfully connected to your computer, Now click load packed button to add .Pac file (this is firmware or stock rom that comes as .pac).

    

    Spreadtrum upgrade tool

11. When you have successfully added the .Pac file in Spreadtrum Upgrade Tool, click on the Start Downloading button to begin the flashing.
    
    

    

    Spreadtrum upgrade tool

12. During the flashing process your device will restart automatically.

    

    Spreadtrum upgrade tool

13. Once flashing your android is completed, you will be able to see the Green Passed Message in Spreadtrum Upgrade Tool.

    

    Spreadtrum upgrade tool

14. Now you have successfully flashed your Android Device using Spreadtrum Upgrade Tool.
15. To check your new firmware, you can go to settings -> About Phone ->Check Firmware
16. Finish, now you have successfully Flash Rom on Lenovo A1900 using .pac file run on Spreadtrum chipset.

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