I was wondering about a boostmobile cellphone? what kind of codes can you get?

Like free chrips without paying anythin,or free incoming calls,free mobile to mobile,...for a prepaid cellphone?|||The chirps are a $1 a day...no free incoming calls but rates are discounted on nights and weekends. I have boost mobile and I like it. Downloading stuff to your phone is easy and you can get cool ring tones and wallpapers for a good price.