These photos were taken with my 2011 iPhone 4, a couple with flash and the rest without, in a dimly lit hotel ballroom.

I didn't want to make a pest of myself with a big camera and big flash, in a trade show environment, like that guy in combat boots and camo shorts, with big open sores on his legs, that shot guerrilla style paparazzi photos at the European Summit and Xbiz London.

I won't be able to afford to upgrade my iPhone to the next generation with newer camera, until Fall 2013 at the earliest, especially if I return to the UK this summer. (UK VAT sales tax is 20%, compared to US 8 1/2% on average, coupled with currency exchange rate at about 1.50. That makes a $499US iPhone about $800US in the UK.

I was OK with doing that in 2011, because unlocked iPhones weren't available in the US before I left for the UK, 6+ months before unlocked iPhones became available in the US. I've used mine in 6 countries... every country needing a SIM card specific for that country. (UK, IE, CZ, DE, US, FR).

I've used O2 and Voda as UK and EU carriers, with H2O and T-Mobile as US carriers.