Iphone 4 turning on and off? - 1

My iPhone 4s won't turn on unless plug into wall charger, but after I did that my phone showed some things wrong like the clock changed to 7AM, no network service (keeping searching), Wi-Fi disabled (can't click), then a minute later it went freeze. And it won't stay on long enough for reset(the home button and the button on the top). And if i connect it to the computer it won't even turn on, it will turn off at the apple logo without showing the interface. What happen and what can I do?

Added (1). When it first started the iphone was connected to laptop and suddenly no signal(keeping searching) … Then when i plugged it out it went dark

Throw it against a wall.

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