Plug and unplug the earphone cable and stir it back and forth in the earphone hole with a cotton swab.
2. Charging, shake the charging connector back and forth.
3. Restore Settings-General-Restore-Restore all settings.
4. Check whether the mute is turned off, and press the left key of the mobile phone.
5. If there is no result, just send it for repair. There is a defect called the volume button drop, that is, there is a button stuck in it and pressed all the time.
There is not much money to repair the mobile phone shop. Either the button was pressed or there was something wrong with SPK.
Anti-fall patent
On the morning of March 22nd, 20 13, the United States Patent and Trademark Office (PTO) disclosed a patent application filed by Apple on March 2nd, 20 13, which aims to prevent electronic devices such as iPhone from being broken after falling.
The name of this patent is "a protection mechanism of electronic equipment", and several methods to prevent electronic equipment such as iPhone from being broken after falling are introduced.
One way is that the sensor that comes with the device will detect the falling height and speed of the mobile phone, and then adjust the orientation of the fuselage. In this way, products such as mobile phones can adjust their orientation in the process of falling, so that the falling-resistant position will land first, such as the corner or back, rather than the fragile position, such as the screen. In order to achieve this function, the equipment needs to be equipped with a "protection mechanism", and it may be necessary to change the direction of the fuselage with a small can of compressed gas.
Another way is to slow down the falling speed of the equipment during the falling process, just like equipped with a parachute. In order to realize this function, the protection mechanism needs to trigger a device similar to a propeller, thus reducing the falling speed of the equipment.
Although Apple only mentioned the iPhone in the patent application, industry insiders said that these technologies can also be applied to other products such as smart phones, tablets, portable music players and digital cameras.