My phone is a samsung i9300, I put my phone at the head of the bed before going to bed, it didn t tu

You use the universal charger to fully charge the phone, and then install it back, the phone is in the shutdown state, press and hold the volume up button + HOEM key + power button to enter the Recovery mode, double clear, the volume up and down keys to select, the power button is the OK key, select the first line wipe....Then press the power button, select yes, press the power button, then do the second line of wipe, press the power button, after double clearing, select the top line of English, press the power button, restart the phone, if it still doesn't work, you try, in the shutdown state, press and hold the volume down button + HOEM key + power on button to enter the yellow triangle interface, and then let go, and then press the volume down button to enter the flash mode. If you can't get in, then go to the after-sales service for maintenance, if you can enter Recovery, then enter the Recovery mode to double clear [Shuangqing is to restore factory mode and clear the system cache].

Hello: According to your description, there are many factors why the mobile phone cannot be turned on, and the battery, mobile phone software, and hardware will cause this kind of non-boot failure. We recommend that you try the following:

1. Replace a mobile phone battery of the same model for testing or send the battery to the nearest service center for testing.

2. Take out the battery, clean the metal contacts of the battery with a rubber and test.

3. Take out the SIM card and SD card at the same time, and then press the power button for more than 10 seconds to test whether it can be turned on.

To save you time waiting at the service center, please use the Samsung repair appointment request.