network/service book dependant, wi-fi surfing, calls & texts all go over wi-fi for me, and most broadband providers wi-fi @ that ! even though Orange say Orange Broadband ONLY, bad news for open wi-fi, great news for me
UMA works by turning broadband wi-fi into a mini cell that connects to your telco network server
Telcos cell sites have exactly the same - a broadband connection, although with massive gigs & gigs of bandwidth
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