unlocked Windows Phones at Microsoft Store

Now that Microsoft has purchased Nokia, they should start selling unlocked GSM Windows Phones at Microsoft Stores. Someone needs to break the death grip the carriers have in the US. If Microsoft sells its own phones (either branded as Nokia, and/or hopefully also as Surface phones) they can push out OS updates without waiting months for the carriers to do "testing." The consumer benefits by greater choice, and by better service. Stop with the bi-annual upgrades, upgrade fees, lack of choice because your carrier doesn't carry the phone you want, etc... Get the phone you want, when you want it. Just drop in your SIM. Microsoft Stores could market the shit out of this and win over some Windows Phone converts.