their server could be down, try giving your provider a call and find out whats wrong, if it is only yours, thrn they can look into it and try to help you fix the problem, but if it has recentley been slow and such, i suggest you wait a couple of hours and resetting your device
i dont mean unlock by jailbreaking, i mean if i move to another country, and i have a phone that is locked to one cell phone company, is there any way that i can safely unlock the iphone so that it could go with any cell phone provider in the world?