i recently purchased an andriod phone from att called samsung infuse 4g and i wanted to install my own ring tone. so this is what i did

i connected the usb cable and selected mass storage from the option, then navigate to this location:


G is whatever drive your andriod is installed.

this is the location where you need to put your ringtones.

note. they have to be in .wav format, it will not work in mp3 format

hope that helps