Sorry for the late reply due to the weekend.
Our company customer service will reply you within 24 hours in working days.
Though sometime we do overwork during weekend, and due to the different timezone, there is a little delay, sorry about this.
The strange noise when you play radio may be caused by the interference from other wireless signal, even the inside car electrical accessories.
As I know, the aftermarket head unit can hardly have the perfect compatibility which does not like the original one, sorry about it again.
About the android 4.4 upgrade to android 5.1, if it's available with the update firmware, we must send you the right firmware and the way to do it.
But both the factory and our company tested without success.
About the attached picture and video, the screen flashing maybe caused by the third party apps, and the unit work normal when there is a app icons and letter from the home screen, it's not a function problem, hope your understanding.
In order to show our sincere, you can contact our amazon customer service and they will give you the best solution.
RegardsStatistics: Posted by Jammy — Mon Oct 31, 2016 2:40 am
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