Primo H3 4.4.2 Driver, flashtools & firmware (Bugfixed) Download Link: Download
Primo H3 4.4.2 Firmware (Bugfixed Version) upgrade instruction
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 scatter file from software
5. Click Firmware->Upgrade and connect USB cable with mobile (mobile must be off)
6. Then start downloading..
7. When it shows Firmware Upgrade , then installation is completed.
Primo H3 4.4.2 Firmware (Bugfixed Version) upgrade instruction
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
6. Then start downloading..
7. When it shows Firmware Upgrade , then installation is completed.