I am using iphone 4s.i am big fan of apple.there is no problem pf hanging.you should to take care of it.if u using android n suddenly started to use iphone then there is possible you dont like iphone because there is some limits in iphone in application n all such a things.
I am very comfortable with using iphone.because there is good picture quality.good sound system n no hanging problem.just need to take care of it.