This app was mentioned in 2 comments, with an average of 2.50 upvotes
Oooh that's good. There might be something to this then.
I did find the firmware for your deck, but it's from 2012. So even though you bought it last year, it's still an older deck. It's the last button under the "CD Receiver/ Digital Media Receiver Updates" category: http://www.jvc.net/cs/car/firmware/
I'm looking around to see if I can find any info. It may be worthwhile to call JVC and see if they have any suggestions.
EDIT: Might be worth checking out JVC's ridiculous looking app: https://play.google.com/store/apps/details?id=com.jk.openlink&hl=en
Your model number is listed in the details, but only under bluetooth support. But who knows, maybe something with USB will work.