24 here, the i4 is the longest iphone i ever had ( 3 months and counting!!!)
i use to switch phones like nothing, my phones lasted me like 1 month TOPS, but since i got the i4, i had to put a 1k deposit with ATT (my fault actually) so there is no way i can switch up like i use to until at least a year later till i get my deposit back :X so till then, im stuck with this!