Abstract: A wearable device includes a frame element and a dielectric substrate. The frame element includes a first metal element, a second metal element, and a third metal element. A first gap is provided between the first metal element and the second metal element. A second gap is provided between the second metal element and the third metal element. A third gap is provided between the third metal element and the first metal element. The dielectric substrate is surrounded by the first metal element, the second metal element, and the third metal element. A first antenna element is formed by the first metal element. A second antenna element is formed by the second metal element. A third antenna element is formed by the third metal element.

Abstract: A volume adjusting system, a volume adjusting method adapted for a mobile phone, and a computer-readable storage medium encoded with a computer program are disclosed. The mobile phone comprises a speaker and stores an optimal hearing volume and a volume range. The method includes steps: detecting a volume of a telephone voice of a caller when the mobile phone establishes a call communication link with the caller, determining whether or not the volume is within the volume range for optimal hearing, adjusting the volume to the optimal hearing volume when the volume is not within the volume range, and controlling the speaker to output the optimal hearing volume. Therefore, when the mobile phone makes a call, even though the volume of the caller is low or high, the system adjusts the volume to the optimal hearing volume, and it is comfortable for the user of the mobile phone.

Abstract: The disclosure provides a mobile phone with protection for user information and a user information protection method adapted for the mobile phone. When the mobile phone is lost or stolen, the mobile phone user can send a short message to the mobile phone, using another mobile phone, the original mobile phone recognizes the contents of the short message and will determine that the short message is a command for deleting the user information if a validation code is included in the short message, and accordingly deletes the user information in a SIM card and also stored in the mobile phone.

Abstract: The disclosure provides a call prompting function and a call prompting method adapted for a mobile phone. When the mobile phone is already busy and receives another call, the mobile phone acquires a phone number of the unanswered and blocked mobile phone. When the phone call ends, the mobile phone sends a short message to the unanswered and blocked mobile phone, informing the user of the unanswered and blocked mobile phone that the first mobile phone is now available for calls, avoiding further wasted call attempts.