What applet you running that requires 64bit? Didn't know it took an iPhone to need 64bit processing to play music.Hey guest thats all great on a desktop computer.
But who the hell is working on 4GB+ files and large data sets on a 4 inch Iphone?
64bit on cell phone will be the same as it was when it came out on computers at the start there will only be small benefit and as time goes on it will increase but its not going to make your phone 100% faster no matter what the marketing slides show you.
Stop drinking apple juice dude.
Hey I work with 4 GB files on my phone all the time all 4, 8 or 16 of them and can't wait to start working with 5 GB files... well all 3, 6 or 12 of them :-D