Blackberry os 220.127.116.114
I have download and installed this new OS onto my Windows 7 PC and when I try to upload it onto my 9810 its says no OS found for the device and its years I have installing new OS on my devices I'm lost
read through this how to, All In One Guide - How To Upgrade Your Device - with Pictures & Videos, and it should give you all the steps needed to get you up and running. Let us know if you run into any problems.
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― Eleanor Roosevelt
Where did you download the OS from?