IPhone 4s says 100% charged but when unplugged it dies?

When its plugged in it says searching for service and Wi-Fi and the date/time is all wrong. It worked just fine earlier today, any way this problem can be fixed?

Take it to the apple store. My friend had the same problem and he got a new phone.

May be software problem try to restore it from iTunes on a laptop/computer

Hopefully it should work

Or if you got warranty replace it from apple store

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