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[Przemolog]

Originally Posted by TheMadBrewer

I understand the theory -- I'm just trying to help a guy who seems to need a little help. The "+" is not used very much in the US and many phones don't have the key marked. You have to dig thru the manual to find out that its "hold the 0 down for a long time" or some such. "00" works with Riiing/UM and he was little unclear on that, using just "0"

Yes, perhaps "+" before the phone number and the whole GSM is just a European unpractical invention from the American point of view
However, I suppose that + preceded numbers work also in US GSM networks, right?
I'm surprised after all that "+" may not be explicitly placed on the keyboard a GSM phone. Anyway, now it's clear to me what you advised to dial numbers preceded with "00" instead of "+". And IMHO if "00" format works in UM in Europe, it should work anywhere independently of the local formats. It's because UM itself uses callback - the destination number is transferred as a USSD code to in the number format acceptable by the FL1 network (+ and 00 both are). And the are also USSD non-prefix solutions like in case of Hop: http://www.hopmobile.com/manual4.html.