Nokia 3650, Cingular, Mediaworks Unlimited (while mobile), and FastAccess DSL 1500k speed (while at home). Always worked fine - no problems. Then, got a black Motorola Razr v3 from Santa last week, and it works just fine too. Don't expect Cingular to support you on anything 770 related; they will cut your service if they think you are getting your money's worth on the unlimited internet.