What mobile phone do you have?

[IDmad]

I'd recommend samsung galaxy S3 if u can afford it. If u can't afford S3 then S2 or galaxy nexus.

iPhones are just overpriced shit. Over here 4S still costs around 600 euros when S2 and galaxy nexus are under 400 euros.
S2 and nexus are both as good, maybe a bit better than 4S (screen size, CPU, memory...)
Btw after u've been using a bigger screen for a while (4,3 inch or bigger) those smaller screens feel really small and stupid 

If u really need a new good phone just buy the new nokia lumia 920. It's not as common as an iPhone, has a good camera and it doesn't break down the first time u drop it, unlike an iPhone  oll:

Also here's a review worth checking:
iPhone 4S vs. Samsung Galaxy S 2