iphone 5 is nt released yet as a rumour suggest that iphone is going to release at 5th september in usa and other date internationally. while galaxy s2 is better than iphone 4.
That's also I've read and heard about definiteley 21 mbps 3g speed and it is so slim/thin and light. Price wise this is the most inexpensive of the three considering their features.
I guess i have to agree that Samsung Galaxy S II is better. =) We'll see when iPhone5 release. Some news says it is also slim. =)
Choose for blackberry, because it have Blackberry messenger which is mostly everyone in my country using it and my friends also.
If i using other cell, i will hardly contact with my friends and make me very boring. Also i will save a lot of expense for texting. Even there's a lot of messengers but blackberry messenger is the easiest and not many people using it for mobile.