This will get rid of those annoying ads on your lockscreen. Assuming your device is rooted and you have ES File Explorer. Make sure that in ES File Explorer setting>root settings everything is checked. Now open ES File Explorer and go to "SYSTEM" folder, then go to "APP" folder, look for Dtcp_apk.apk, simply rename it to Dtcp_apk.bat. now you can turn your screen off and on and no more ads will show.! Another way is to change permission on the file by long press on dtcp_apk.apk and go down to properties and tapping change on the right hand side and uncheck all boxes. then press ok and ok on the next screen. Edit: if none of these work, a third way is to download ROM Toolbox, go to App Manager>All Apps>Kindle Special Offers. touch it and touch Freeze. it should disable the offers immediately. Reboot device to make sure it works.