The Tecno IN5 Auth file is typically required for the following scenarios:
Manually installing the latest stock firmware to improve system stability. How to Use the Auth File with SP Flash Tool To successfully flash your Tecno IN5, follow these steps: How To Use SP Flash Tool (Full Guide) tecno in5 auth file
Restoring a "dead" device that no longer turns on due to software corruption. The Tecno IN5 Auth file is typically required