I you can wait, do that. If you go ahead, be sure to read how folk solved it.
Hi,
So heres the situation. I have an iPhone 4, and a macbook running Snow Leopard.
My son has a 3GS, which I use to find out where he is using find my iphone.
Apple are continually forcing me to upgrade to iCloud, but do I REALLY need to upgrade the 3GS (to iOS5) and MacBook (from snow leopard to lion) to do this??!

Chowhound
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