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Why is the red light on the left side of Samsung note2 on?

Samsung mobile phone LED indicator color is divided into the following situations:

Blinking blue light: Missed events, such as unread text messages/missed calls.

The blue light is always on: when the machine is turned on and off.

Red light flashing: when the power is lower than 15%

The red light is always on: charging.

Blinking green light: apply event prompts, such as WeChat.

The green light is always on: charging is complete.

Note: The color of LED indicator is the default of the system and cannot be adjusted.