How to fix reboot?

Hi!

Usually in cases like this you may have to flash new software on the your phone as there may be software problems causing the phone to restart. You may want to try to restore your phone using the Windows Device Recovery Tool.

Please be aware that this will almost certainly erase all the data on your phone. So backup any important information BEFORE you connect your phone to the program.

• If your phone is still restarting after flash your phone software then I would next recommend opening the phone to check for any signs of physical damage or liquid damage. If you feel comfortable opening your phone, follow this YouTube guide to disassemble your phone: https://youtu.be/yLCwTk4DlYs

Please note: You will need a set of Torx screwdrivers and opening tools to remove screws and parts, both of which are readily available on the iFixit store and on Amazon.

• Check for any signs of corrosion or obvious signs of liquid having come into contact with the motherboard (usually will present as green or white powder like substances, though may be different colors)

If neither of those fixes do not help you then your phone may have a fault with the motherboard. At that point I'd recommend contacting a professional to have the specific program diagnosed.