The 2021 official app was called (version 2.1.8 or 2.2.0). Since it is gone from the Play Store, you must sideload it.
: Turn off the target smartphone. Hold the designated service key combination (usually Volume Up or Volume Down) and connect it to the PC using a stable USB cable. otsmart v100 download 2021
If your Otsmart V100 is stuck on boot or not syncing steps, you may need to reflash the 2021 firmware. This requires a Windows PC. The 2021 official app was called (version 2
Ensure the target smartphone's battery is charged to at least 50% before starting a flashing operation. A sudden power failure during a flash write can permanently damage the storage chip. otsmart v100 download 2021