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Join Date: Jan 2014
Location: Newport Pagnell
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worked for me
I got a HDX 7 for chrimbo and managed to root it in about 2 mins. (apparently this doesn't work for the 8" one)
If you google "android cowboy how to root kindle fire hdx 7" (I'd post the link but in a new user and it wont let me) and pick the first link (published by Arash Soheili) you should see the page I used. Then I used another Android Cowboy guide to stick SafeStrap on there.
I'm yet to put my own ROM on there and get Google Apps running, so if you get that far, give me a shout!