Lumia 820 ATT--cannot update to Cyan

jmshub

Moderator
Apr 16, 2011
2,667
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Does your phone have the Developer's Preview? If so, you'll have to use the Nokia Software Recovery Tool (available here: FAQ - How can I recover/reset/restore my phone software? - Nokia - USA ) to install the firmware that way. When I attempted to revert back to 8.0 on my wife's 920, it downloaded the 8.1/Cyan firmware update. Just make sure that you have backup turned on, and I took screenshots of my start screen to ensure that everything was set back to my liking.
 

RumoredNow

New member
Nov 12, 2012
18,134
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Do you have an AT&T SIM in?

If you are running unlocked, try taking out the competitors SIM.

​Also you will want to be on WiFi as the update is over the amount needed to force WiFi only download.
 

aikidaves

New member
May 21, 2014
317
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In Settings, extras+info, what's the manufacturer name? It's possible that your phone isn't being recognized by AT&T as one of theirs.
 

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