This is not really an official rumor more what i saw on the verge forums.
Apparently somebody who purchased a 900 when it launched was able to upgrade to a 920 by going through customer service for ATT. The ponit he made was he explained his situation about buying the 900 and probably threw in he didnt know it was not upgradable to wp8 and all that and they allowed him an upgrade, but didnt give him the free charge pad.
Somebody else replied and said he was able to do the same thing. So it doesn't hurt to give it a try if you were one that got a launch 900. Worth a shot and call them to preorder instead.
link
PSA for those of us who bought the the Lumia 900 on launch. | The Verge Forums
Here is a tip, if you are going to try this, dont be a complete douche and act all entitled, they are doing you a favor, if you they say no, call back and get another rep.
Apparently somebody who purchased a 900 when it launched was able to upgrade to a 920 by going through customer service for ATT. The ponit he made was he explained his situation about buying the 900 and probably threw in he didnt know it was not upgradable to wp8 and all that and they allowed him an upgrade, but didnt give him the free charge pad.
Somebody else replied and said he was able to do the same thing. So it doesn't hurt to give it a try if you were one that got a launch 900. Worth a shot and call them to preorder instead.
link
PSA for those of us who bought the the Lumia 900 on launch. | The Verge Forums
Here is a tip, if you are going to try this, dont be a complete douche and act all entitled, they are doing you a favor, if you they say no, call back and get another rep.