Just get something like this.

http://www.ebay.com/itm/Newest-Bluetooth-Car-Kit-MP3-Player-FM-Transmitter-SD-LCD-Dual-USB-Charger-Blue-/361353056050?hash=item5422520f32:g:ah4AAOSwie5XTUbP

>>17269965
okay I got one, thanks I just wanted to make sure it would work for a car like mine

>>17269959
>I have a galaxy s7 but want a universal plug for all types of phones if that is possible.
There are only really two types of phone connector - lightning cables for apple products and micro-usb for literally everything else in the world. The closest thing you'll get to a universal connector is to buy a micro-usb cable and a lightning adapter to go on the end of it for when you connect an iphone. The downsides to this plan are the fact that apple products don't allways work well (or even work at all) with third party hardware, and also that you'll probably loose the adapter the very first time you take it off.

A much better solution would be to follow >>17269965 sugestion. Those bluetooth/FM kits cost next to nothing, and yet they work really well. There's certainly no difference in sound quality between that and an aux cable.