I was playing sudoku on my phone earlier, like I've done thousands of times before (literally!) and all of a sudden some really pornagraphic pictures popped up, trying to direct me to a porn site.
I don't think it's the sudoku app, because I had it happen once before when I was reading an article on Facebook. It wasn't porn related in the slightest, so I was confused then.
Now it's happened twice it's started to worry me, because quite often I'll have mates kids asking if they can play games on my phone and I'd be mortified if these images popped up while someones child was playing on my phone.
Any ideas where they came from and how to stop it happening again? I haven't done a software update for a while. I'm on ios5. Last time I did an update I lost everything on my phone (including all my numbers) and I was without my phone for days while it was fixed. So I'm really reluctant to do another upgrade.