I removed the Uconnect module and it's T-cable and the mic by unplugging from the little plug near the top of the A-pillar but not the larger plug on the side of the dash on the driver's side under the removable panel. The rear view mirror power is in that cable bundle so mine still works and everything, including steering wheel controls work perfectly with my PAC RP4-CH11 and without the Uconnect module.
The units that come with their own CANbus box are a good cheap solution because you don't need the tight integration with anything in the Jeep that expensive interfaces offer, just steering wheel controls.
I haven't been able to track down one of these Joying head units to check out in person but they look pretty good!
When it comes to Android head units, sub-par specs will give you a sub-par experience. I recommend Android v7.1, a 1.5ghz octa core processor, 4GB RAM, 32GB ROM and 1024x600 resolution for a 7" display but obviously higher specs are better.
ROM is only used for storing apps and media so you can get less if it's significantly cheaper and will stream everything but don't skimp on the RAM - it probably makes more difference to how responsive everything feels than the processor.
Look for a matte screen with good brightness/colour/contrast for decent legibility in bright daylight. If user reviews talk about a screen being unresponsive to touch, steer clear - most apps are already fiddly enough to use on the road without needing to look at the screen to know if your tap or swipe was registered.
Most head units come with their own home screen launcher, which means the Android version doesn't make much difference, but there are lots of great launchers and driving-mode apps or you can just use the Android Auto app. The IFTTT, Tasker or Automate apps can also get setup as "hands-free" as possible. Newer versions of Android will future-proof it a bit because apps will keep supporting Android v8, v9 and v10 for longer and you do have a better chance of seeing an update from a company that ships head units with up-to-date software.
The clincher for me steering away from Android head units was their audio quality. The sound that the hardware outputs just didn't sound good enough to me although there are software EQ solutions to help with that (to an extent) and if you do your streaming via bluetooth or you listen to mostly radio or podcasts, then you might not notice it anyway.
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The average human walks 1,500km per year and drinks 83L of beer which means we're getting 18km/L.
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