im still ddebating if im going to get the 16gb or the 8gb or wait until they release the new iphone? it's time for me 2 upgrade my fone... if im going 2 get d 8gb and usualy i do a lot of travel n den i have a poor wifi location should i nid 2 get d data plan? and try to unlock d iphone? coz sometimes i have to change d simcard if im going 2 unlock my iphone it will not affect my data plan or it will affect?