Best adapter for phone to spotter

[Hormhunter94]

Just got a new vortex 22-48x65 razor  and so I was wondering what others prefer to use to hook up their phone to their spotter to get the best pics. I know there's a few different ones to choose from so I wanted to hear others opinions on which is the best. Thanks in advance!

[BULLBLASTER]

I like my s4gear one. It's compatible with most phones and spotters.