How to set radio range, language and Nav button for android 4.2 unit product SKU: GS-C0219

This is a customer problem about Radio:

I live in Russia and I tried to change regional settings to Russia and Europe – for radio frequence,
We have 2 bands of FM
The problem is that radio works just 5 minutes after car starting
Then, radio don’t make search of stations at all
This began after 2 or 3 weeks after installing of the unit.
In the beginning all was okey dear. Its radio station with known frequency, frequence displayed well, but theres no sound.After this happened, when I try to change frequency, on radio interface, it doesn’t search stations, each button change frequency just at 0,5 mhz.
No search work. For now after android’s start radio works, but 5-7 minutes after it shuts down. Please help.

He bought this one Pumpkin Pure Android 4.2 Two Din Universal Car DVD GPS Navigation

Android 4.2 plug and play head unit

First, you can see the top right corner RST, please find some sharp to press RST to reset it. If the problem is still. I think the your country radio range is set wrong.
Please watch this first video to set the right radio range for your country. Then see the second video to set the language.


After that button Navi don’t turn on navigation program, this video can solve it.