Default [q] help htc one dual sim update

Hi,

I just bought HTC ONE Dual Sim. I didn't know that you cannot update the software prior to buying it.
I stuck with it. Is there a way to update the phone. I just an ordinary girl. I don't really understand the technical part.
Is there a video how to do it? Is there hope on updating my phone to 4.2.2?

Thanks

Olive
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