Hi, here is the latest firmware of F3 pro

Download here: Doogee F3 PRO Android 5.1 MTK6753 Smartphone Firmware R17 21-10-2015
Tool: SP_MDT_exe_v3.1504-A2015.03.18-v06-customer

You can also refer to this flash guide:

1. Decompress the package, find the SP Flash Tool. Or download here: SP flash tool or SP_MDT_W1428 How to flash MTK smartphones with SP flash tool

2. Double click the flash tool application.

How to flash MTK smartphones with SP flash tool

3. Click download, then you click Scatter-loading.

How to flash MTK smartphones with SP flash tool

4. Open the firmware folder.

How to flash MTK smartphones with SP flash tool

5. Click “MTXXXX Android scatter” txt file.

How to flash MTK smartphones with SP flash tool

6. The interface will like the picture showing below.

How to flash MTK smartphones with SP flash tool

7. Click Download.

How to flash MTK smartphones with SP flash tool

8. Click your phone to computer via USB cable.

How to flash MTK smartphones with SP flash tool

9. It will download automatically, when the progress bar is full, it means the flash is finished.

How to flash MTK smartphones with SP flash tool