Follow along with the video below to see how to install our site as a web app on your home screen.
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Just wanted to add that it's possible that it is hardware failure as well - a faulty battery, or faulty charge circuitry.Basic problem determination ...
Do a Wipe Cache Partition deleting all temporary data and nothing else.
If it is still a problem ... restart in safe Mode disabling all apps you added without uninstalling them. If it stops it is caused by an app that you added.