There seems at the moment to be endless repetition of common questions regarding the recent Kodi Krypton release.
So a FAQ is needed:
Q. I cannot install Kodi Krypton on my Android device ?
You need Android Lollipop 5.x as a minimum OS for Kodi Krypton. Kodi cannot help with Android Firmware upgrades. See your device vendor for help or the Freaktab website. Other causes are 3rd party Kodi versions blocking installation, these need to be removed first…
Q. I need to Uninstall Kodi ?
Generic touchscreen Android > In Android Settings > Apps > Downloaded Apps > Kodi > Uninstall
Android TV > simply Long press the big OK button over the offending Kodi App and move to the Trash Can.
Q. Where can I download Kodi Krypton 17.0 final for Sideloading (using X-Plore File Manager App) from a USB Stick ?
http://mirrors.kodi.tv/releases/android/…bi-v7a.apk
Q. I turned my Android device on this morning and find it has Auto Updated from Kodi Jarvis to Krypton – why ?
Android Apps in the Google Play Store will autoupdate when new versions become available unless you specifically disable the Auto Update feature in the Google Play Store itself. This is not a Kodi problem.
Q. But Kodi Krypton now does not work properly, help ?
Old incompatible (with Kodi Krypton), or very poor device Firmware will be the problem. Kodi cannot help with device Firmware problems. Bug your seller of visit the Freaktab website.
And stop buying Chinese junk, Android devices that get no Firmware support from the seller.
You will either have to install Koying’s SPMC (Kodi Jarvis version) or Uninstall Kodi Krypton and sideload Kodi Jarvis 16.1 again from here:
http://mirrors.kodi.tv/releases/android/…bi-v7a.apk
PS. Don’t forget to Disable Google Play Store – Apps Auto updating.
Q. My DTS and Passthrough Audio no Longer works with Kodi Krypton ?
Please read Welcome to Android MediaCodec (Audio) standards and hassle your device vendor and manufacturer to implement the required Google IEC Audio standard in Android Firmware that is now used by Kodi Krypton.
Q. But I have the required IEC Audio support in my new nVIDIA Shield, and passthrough audio still does not work ?
See Page #1 or #2 of the nVIDIA Shield threads in this Android sub-forum or Hardware sub-forum for specific help.
Q. My Philips / Sony / AMLogic device / TV no longer plays video properly with Kodi Krypton ?
Again it will be a Firmware support problem, details of Kodi Krypton changes for such devices are in:
Welcome to Android MediaCodec (Video) standards
Q. I am seeing a strange small preview circle on the right centre of the screen ?
Your system is infected !
Its called the free ES File Explorer App. Which has now turned into the most annoying Adware, Bloatware, Spyware App on the Google Play Store. Uninstall it right away and use the X-Plore or Total Commander Apps instead. Then warn others in the Google Play Store and Vote the ES File Explorer App 1 Star. 
W.