3g phones are not considered obsolete. Technology changes so frequently that for an item to be considered obsolete it must be on the market for many years.
Not necessarily. 3G just means the phone can do 3G speeds with the providers internet service or data service. A smartphone can do email, internet, and much much more.
I 3G phone has the ability to use the internet at 3G speeds. A GSM phone is a phone with a sim card that if unlocked can be used in most places in the world. GSM carriers in the US include AT&T...