It would be nice if there was a standardized way to store numbers in mobiles with a way to automaticly replace the prefix depending on conditions, in a configurable way. (For example, here in Brasil, for long distance calls, the prefix is 0xxyy, where xx is the long distance carrier and yy the area code, the prefix for local collect calls is 9090, the prefix for long distance collect calls is 90xxyy (xx and yy same as above), but most carriers won't let you use the longdistance collect call prefix to do a collect call to a local number even though you can use the long distance prefix to call a local number; and if you use a long distance carrier that isn't associated with your mobile carrier the costs skyrocket. So to sum it up, dialing using the standard international prefix doesn't work, if you use a different carrier you need to use a different prefix, and you need different prefixes if the number you're calling from is or isn't from the same are as the number you're dialing to. And for numbers outside the country it's the same thing as for long distance calls, but it's two zeros instead of one, and i don't think there is a way to do a collect call automaticly)