Quote:
Originally Posted by qadzek
I had the same problem on my K4: `This device is not authorized as a test Kindle by the developer of this item. Please contact the developer.` or `This item is not signed by an authorized developer. Please contact the developer.`
The solutions seem to be:
- Keep your Kindle permanently in airplane mode.
- Register your Kindle: Menu button > Settings > Registration. This requires an Amazon account.
The same should work for you.
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You can block Amazon's domains that overwrite this:
https://www.mobileread.com/forums/sh....php?p=4545829
Would rather not register and this worked