What is power reset or unknown upload mode?

Power reset refers to the act of completely shutting down and restarting a device in order to fix any issues it may be experiencing. This involves turning off the power source, waiting for a few seconds, and then turning the power back on.

Unknown upload mode is typically a situation that occurs with Android devices that have been unsuccessfully flashed or rooted. It is often characterized by the device being stuck in a black screen with a message that says "Unknown Upload Mode". This mode is a safety mechanism that prevents users from accessing the device's internal system, as it can be dangerous to modify certain settings or files. To fix this issue, the device would need to be flashed properly or restored to its original firmware.