Help Vodafone 845 info!

I have vodafone 845 5 days and i think this phone are crap. When you go to meniu it little lagg when you listening music lagg when your phone sleeps when some one sending file on bluetooth you need reon mobile and phone battery wery bad if you don't do anyting 7h and 50% of all battery. If some one know how to fix many of these probliems say here or if don't know then this phone realy crap.
ok its not the bestbut you get what u pay for. I can get mine doing 2 things lag free.
Big sd card is useful . use wifi instead of the phone for data will speed things up . what launcher are you using I find zeam better then canavas for example .
How big was the file and waht where you sending it to pc phone etc