Antenna and phantompower

[palermo]

Hi
I have the following problem:
I use this android 8-radio in a vw Passat 3c.
Radio reception is poor.

I have a fitting 2x fakra-adapter for my car, but when I connect the 12v to power the radio shut down. Is there already phantom power on the ant-out? I measured some volts.

If there is some phantom power, where can I switch it off? Or how can I block it?
Any suggestions?

Thx in advance

[Jammy]

Hi, there are 12V power out put on the wire "Ant" when you start the unit .Sorry that i don't understand your query,could you mind show me some pictures or an video to help me understanding.
What is the phantom power or what did you pointed to ?
And could you tell me your order number so that i can confirm your unit model .
Regards