The auto-lock function automatically switches the lock state based on the Bluetooth connection status with the smartphone and signal strength. When the device is in close in proximity with the smartphone it enters the lock mode. Please adjust the auto-lock sensitivity to the low side in "Advanced Settings" > "Devices". If it is already at the minimum value, it is possible that the Bluetooth signal of the smartphone may be weak by default. When the smartphone is made of metal frame/casing or is in close contact with the human body, the signal strength may significantly decrease, causing it to enter the lock state even at close distances. Even when approaching the device, it does not enter the unlock mode or takes time. In this case, Bluetooth may be disconnected or the signal may be weaken due to the smartphone's power-saving features or certain apps. Please try disabling the power-saving feature. Also, when using the AlterLock device, keep the app running in the background. Depending on the smartphone model and settings, Bluetooth connection might take time or fail to reconnect after the smartphone has been in sleep mode for a long time. In such cases, please exit sleep mode and display the app. Even if the distance between the device and smartphone has not changed, the lock state switches intermittently. Especially indoors, where there are many devices emitting electromagnetic waves near the device and smartphone, intermittent signal interference may occur, causing the lock state to switch unexpectedly. If Bluetooth is unstable The Bluetooth connection might be unstable depending on the smartphone model, OS version, or individual differences. Updating the OS, restarting the device, resetting the network, or disconnecting other Bluetooth devices may improve the situation. For details on OS updates, please contact the manufacturer of your mobile phone.