Just picked up one of these wifi 903W Video Transmitters For iPhone/Android Phone on Ebay for like $35/free shipping.
Tried it on an old 825c Marcum and it worked awesome. This should work with any fish camera that has the standard yellow video output jack.
Simple to use, just connect the unit to 12v power and camera output jack, download the app, for my unit it was WIFIAV.
On your phone, open your wifi settings and connect to the device wifi and enter password, open the app and bam there is the action.
The best thing is that in the app you are able save videos and stills from camera to your phone and upload anywhere.
Hoping it holds up under winter conditions, I can't wait to try it out.