hay hows it going just got new iphone 4 from verizon
found on here how to do ringtones thats very easy with the bigasoft iphone ringtone maker
first ? how do i go about putting custom txt tones on the phone
thanks for the help
Nope. It's completely reversible, you can run a Restore in iTunes and it will put it back to factory default, and Apple won't know that the phone has ever been JB'd (unless you tell them).
Greenpois0n would be. Do some research first to make sure that you want to do it before doing it of course, and of course do a 'Backup', and a full Sync in iTunes before you do it just in case.
No problem. You can download the program for your OS from GreenPois0n
To answer your question from before about Cydia. Once you use greenpois0n and it completes, you will see a green icon called Loader. You run this which installs Cydia.