How to internally damage your iphone for replacement?

I've iphone 4 & it still covers warranty span.Bt unfortunately i've upgraded it to ios 7.0.2.& now it's as slow as hell. I've tried everything from downgrading it to consulting the customer care bt i guess it's in vain rght now. According to apple policies if the damage is internal they will exchange it for free bt If i break it, it will cost me 12000 bucks (according to INR) please help anyone. Really not satisfied with this piece of crap. Will be so thankful for your help…

It is not possible. But a phone retailer can surely do that.

I phone ***.
Charge it for 2 days.
Run heavy application

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