Either de the 1s or 1x are a Good upgrade for the Sensation.. If the one s looks similar (for the eyes) to the Sensation, it doesnt mean they are almost the same, just having the s4 is a huge step, no mentioning the sense image chip, the new camera (better than the rezound and amaze), thinner, super amoled screen, new battery tecnhology, etc, etc, etc..
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