Xperia Arc S
The original Sony Ericsson Xperia arc impressed us with its slim design and latest version of Android, but we were worried that its single-core processor might be underpowered compared to the slew of dual-core smartphones appearing on the market. The follow-up to the Arc goes some way to addressing the power deficit, but instead of doubling the cores Sony Ericsson has fitted a faster 1.4GHz single-core processor. Current Xperia arc owners don't need to feel they're missing out, though, as the Arc S isn't hugely different from the original. It still runs Android 2.3 and has the same 4.2in screen, and despite the 40% faster CPU the S doesn't feel any quicker than the original Xperia Arc - Android runs smoothly, but we didn’t see any particular improvement when multitasking.
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