Class B airspace
requires ATC to tell you that you are cleared into it. So if ATC tells
you 'radar contact location, altimeter xx.xx', you're cleared through
that space where he's controlling

No. As you said, Class B airspace requires ATC to tell you you are
cleared into it. You need to hear "Cleared through the Bravo airspace"
or somesuch.

Jose
--
Get high on gasoline: fly an airplane.
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