Hi guys Im a newbie here and I have some questions that I hope someone can answer for me I will really appreciated I just bought the G1 of my friend and I'm on att I was reading about an update called cupcake how can I get this on my phone can anybody walk me thru the steps can you go to a shop and have this done or if there r any other which one is the best one and last aftre doing all the updating can I still use the phone on Att