Go to Settings> Device Options> Tap on Serial Numbers several times> You are now Developer.
Fix permission for Google Play services with an adb command especially if sign in hangs while connecting to servers. Here are quick instructions and rules for installing Google Framework or the Google Services without rooting the 5th-gen Amazon Fire tablet: Opening the Google Play Store is like opening a bigger door or window. The Amazon Kindle Fire is a low-end and affordable tablet, but a few tweaks on the code here and there would bring more services, functions, and applications to the device. sd_shadow has already worked on a number of Android devices including a Motorola Droid X, Droid 2, Droid X2, Droid 3, Amazon Kindle Fire, Motorola Droid RAZR, Motorola Droid 4, and Motorola Droid RAZR M. It’s Amazon’s exclusive mobile OS which is a limited Android OS. The Fire OS is actually based on Android.
