Hey. We have a stock firmware for this AG Style (AG Mobile Style) device here: http://roms.satechhelp.co.za/product/ag-style-firmwarerom/ and it is flashable through the SP Flash Tool.
- Order download and extract the ROM or flash file
- Install the MTK VCOM drivers' if you have not already done so
- Download and lauch the SP Flash Tool
- Click Scatter Loading anf load the scatter from the ROM folder
- Untick 'Preloader'
- Click Download with a green arrow
- Remove and replace the AG Style battery
- Connect the AG Style through a USB cable (without pressing any button)
- The flashing starts with and red and then yellow pregress bar
- You will get 'Download OK'
- Disconnect > boot into recovery > wipe data > reboot...