Release Note: 1> Update OS from 4.2.1 to 4.2.2 2> Minor bug fixing 3> More battery stand by time 4> Overall performance is more smooth, faster than previous 1.Install driver:
1st step: Power Off the phone and Connect your phone with PC via USB cable. Now go to My Computer>Manage> Other devices> MT65xx Preloader
2nd step: A window will appear like below and select Browse my computer for driver software
3rd step: To select driver go to driver folder> USB VCOM Driver> Win7
4th step: Windows security window will appear. Select Install this driver software anyway
5th step: Wait until Windows has successfully updated your driver software
6th step: Now go to Driver Folder> Open MS_USB_ComPort_Driver_exe_v1.1032.1 > Install Driver
2.Open Flash Tool 
3.Open Download Agent and select MTK_AllinOne_DA
4. Open scatter_loading and select SW---> Software-> Primo_H2_V4.3_2013-05-29 MT6589_Android_scatter_emmc.txt
5. Click Download and connect USB with mobile (without battery)
6.When it shows Download ok in green, the installation is completed.
1st step: Power Off the phone and Connect your phone with PC via USB cable. Now go to My Computer>Manage> Other devices> MT65xx Preloader
2nd step: A window will appear like below and select Browse my computer for driver software
3rd step: To select driver go to driver folder> USB VCOM Driver> Win7
4th step: Windows security window will appear. Select Install this driver software anyway
5th step: Wait until Windows has successfully updated your driver software
6th step: Now go to Driver Folder> Open MS_USB_ComPort_Driver_exe_v1.1032.1 > Install Driver
2.Open Flash Tool 3.Open Download Agent and select MTK_AllinOne_DA
4. Open scatter_loading and select SW---> Software-> Primo_H2_V4.3_2013-05-29 MT6589_Android_scatter_emmc.txt
5. Click Download and connect USB with mobile (without battery)
6.When it shows Download ok in green, the installation is completed.
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