When performing a firmware upgrade through the app, there are two phases:

Phase 1: Upgrade the front panel and Wi-Fi module.
Phase 2: Upgrade the Bluetooth module.

Users should note that a successful upgrade in Phase 1 does not mean the upgrade is fully complete; they must check the app prompts to determine whether Phase 2 upgrade is needed. Additionally, during Phase 2, it is important to ensure that the phone and the lock are within Bluetooth connection range.