I met in a subject several cases similar to mine. My device is simply cut down, and then loaded directly into tvrp but it was a couple of times and everything twice managed to restore it. For the third time to flash through rekaveri failed. I decided to flash through fleshtul. Doproshivalsya that turn the phone into a brick. Fleshtul constantly gave error, in short a lot of things altered. Again from the ground began to reinstall prelauder, did everything as it should, but the endless mistakes. In google scored homtom s99 rom official, was on the very first link, it downloaded three files: the driver and firmware fleshtul in a separate folder, to avoid confusion. I sew the first time, without clipping the volume keys. Just format all + download. As a result, the eighth android version R08 firmware.
Maybe someone will come in handy.
Site with firmwareSP_Flash_Tool_v5.1836_WinMTK_USB_All_v1.0.8Homtom_S99_MT6750_20180604_8.0.0