This guide is for only mediatek (MTK) phones like Tecno, Infinix, Itel, Malata......that refuse to come up after interrupting SPflash tool flashing process.
What you should know about SP flash tool is that you shouldn't interrupt a flash or read back process. If you do, the phone will go off and not come on at all.
You might get the "USB device not recognized" error if you try flashing the device again.
If you eventually interrupt the flashing process, your phone is as good as d*ad, Dont panic
all you need to do is connect your phone to a computer or charger via USB cord and allow it to charge for some time. It could take up to 2 hours for the phone to come up, if it does the battery might be lower than 1% just leave it to charge before you power on.Tips to speed things up
* Remove the battery from the device > Connect the phone to a charger without battery inside > Slot in the battery while the phone is still connected to the charger
* Keep pressing the Volume up + Power button while charging the device
* You could remove and boost the battery using a desktop / external charger then resume internal charging.
* Re-install MTK preloader vcom drivers