so a girl i know wants me to unlock her 3g for her. i tried yellowsn0w on my 3g when it first came out and it caused some signal issues. i was still using my AT&T and heard others report similar issues so i am just wondering who here has successfuly used it to unlock a 3g and if they have had any problems. i have no problem getting it or installing it, i just don't feel like babysitting and being the doctor for all this girl's iPhone needs and concerns if it doesn't work good. thanks.