I dropped my iphone in the pool Friday and it's done. My friend thought he lost his phone a few months ago and used the warranty to get a new 4s. He has found his old 4s since then and gave it to me to use. When I took it to the carrier to get it activated they told me how the warranty has been used on the phone and said I could not use it. Is there any way around this? Will it help if I unlock the phone? Any advice would be appreciated.