How long before a gamertag is available?

I heard if you change your name to a new name, then the original name will become available again. How long does it take? 2 business days? A few hours? Weeks?



ex.



original GT: billy

changed: billy123



Billy is now available.
How long before a gamertag is available?
it should be available almost instantly....if that doesnt work then i dont know

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