First step to Install Firmware 

1. Sky Offline Flash Tool V1 Sky Flash Tool 2014 B2
2. Sky Offline Flash Tool V2 Sky Offline Rom Flasher
3. Sky Vega All Usb  Driver Install on Computer

How To Flash Sky IM-A840S 

1. Download Offline Flash Tool And Drivers.
2. Install Ofline Flash Tool And Sky Vega Drives
3. Update Your Microsoft Internet Explorer
4. Put Device in SW Upgrade Mode
5. Turn off the phone, press the 3 key (Power + Volume Up + Volume Down) to enter the mode selection screen. Use the Volume Down key to scroll to the “PLD DOWNLOAD” and then press the Power to select the item. Your phone will switch to S / W Upgrading. Now, connect your phone to the computer using MicroUSB cable
6. Conduct + RunSky_Flash_Tool_2014.exe appear blue window, (remember to do this thing off during flash offline!)+ Link to download the latest driver for drivers who do not identify with the tool is Sky Flash Tool
7. Windows update web interface of the sky will be diSPlayed: + Click the button Upgrade S / W and wait for the results offline! + After finishing flash back door blue book click on it and press any key to self-cleaning program for your trash after flash.
8. Check Installed Drivers in devices manager
9. yor phone start flashing and your phone will be flashed about 5 to 10 mints after flash phone automaticaly restart when phone restart unplug the cable now you have successfully flashed your phone.
10. Press Firmware Upgrade Icon in Internet Explorer
11. After flashing process, starts, it might take up to 5-10 minutes. So, keep patience and wait
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