which phone?

[Robbo]

Roughly, the battery life order is as follows -

4S
S2
Lumia
Sensation

There are a few 4S devices with battery problems, but aside from those, the iPhone battery life is noticeably better than the rest.

'A few days' might be pushing it though, you're looking at 3~ at best unless you hardly use it.

 

[Myshra]

Thanks guys, I suppose my last question is, is it worth upgrading from my current phone (SE Xperia X10) at the moment?

Yes, if only for the extremely ropey digitizer they put on this one (that's the bit that detects what your finger is doing).

 

[kona786]

The S2's battery life will be better than the X10 you have now - can be made even better with the 2000mah ( vs 1650mah stock) sleek extended battery.

 

[moawan]

I got an upgrade of a XE and thought it would be quite good, the Audio on it is so poor i sent it back on the same day it arrived, Compared to my old Galaxy S the Sound is so quiet using just the speakers i was shocked, waiting for TMOB to send me an S2