BMP or PNG of size smaller than 240X320.
reset code
this is the very bad mobile.u have no change wallpaper & one more bad thing is, if u play music player than u have no other work at a time.phone luck also.
OPTION 1-get a microSD memory card and a usb adapter for the memory card then download to the card just like a thumbdriveOPTION2 get a usb cable for the phone and AND A microSD card, then download directly to the card while it is in the phone via the phone's usb (phone must be turned on)