Hi I have had my navman mivue 850 for 2 weeks now and the thing keeps freezing on me, we have put all upgrades in place but nothing seems to work it still freezes. It has been hardwired in correctly, we just cannot seem to get it to stop freezing, we have to keep factory resetting it, please help.

This is the first dash cam that I purchased. After the purchase on Jul, less than a week, rear camera starts failing to connect. After reconnect the cable, 50% chances to successfully reconnect, but over the time, it will be less successful. Since a couple of months ago, the issue started occurring on Front cam as well. After turning on engine, the power is on, and the monitor shows front cam view for like 20 seconds, and red and light blue line appears in the screen and it turned if off itself. It intermittently successfully recording for a while, but for the last week (less than half a year since the purchase), reconnect the cable from camera and power socket even don't work.

Feedback for the manual, it's limited in its details a troubleshooting section would be ideal also, given the feedback Navman get from customers some common issues that come up, it should be included. I have mine hardwired with the smart-box. A negative is that the camera is continually on recording 24/7 and doesn't turn off when the engine is turned off as it did with the standard lighter plug.

The unit is easy to use and set up is simple even for a techno newbie
it comes with plenty of cabling, sufficient enough for a large family SUV or Van
Quality of recordings is good
I am very happy with this unit, having the duel cameras is great and reassuring that events can be captured front and rear.

Having been using the cam for about 2 months, basically I like it. It’s easy to install and the video quality is good even recording at night. I paid extra 100 bucks to buy this rather than Mivue800 because it comes with wifi and GPS. However those features make me feel very disappointed. Wifi are only few times connected successfully. The download speed is so slow. I believe the GPS provides speed info for recording but it’s not accurate. When I drive 50kmh it shows 45kmh. When I drive 40 kmh it shows 36kmh. How can the recording be a proof in accident without showing correct data?

Parking mode requires a separately purchased power supply that needs to be hard wired. Even with the additional supply installed parking mode only works if the unit has GPS reception (ie not in your garage). This means parking in your garage is treated as normal driving and you will store a maximum of 3-4 hours on a 64GB micro SD card. Also note the firmware updates from Navman don't work - they brick your device meaning you're stuck with the speed camera data at point of sale.

I have to say howevery JB HiFi have been great as a reseller, honouring warranty and furnishing replacements...

Which have been needed. I am on the third device in three months due to hardware failure. Well done Navman!

Wifi needs to turned off to record @ 1440p. Even with the Wifi turned off, picture quality is still very poor with number plates not being able to be read at more than approx. 5 metres. Really not worth paying the extra $200 over the Mivue800 which I have in my wife's car. Most of the other features that are not available on the Mivue800 will be turned off as they are too intrusive. The major plus of the Mivue850 is notification of speed & red light cameras