As mentioned in this other subject viewtopic.php?t=57430 here is a quick post on my experience searching apps that read on the car speaker notification from my Android phone (a Chinese oukitel-no-name, I am not really into the hype phone). The NG4 seems to have only the bluetooth profiles to act as a phone handsfree / headset. So we cannot play music, read notifications from gps, sms, mail etc. I am not a native English speaker so don't hesitate to correct me !
So my goal was to find an app being able to forward any notifications I am receiving on my phone to the car radio as if it was a phone call, while listening to radio or music. Of course any app that required more permission than necessary or display annoying add is disqualified immediately

But I have nothing against paying for an app that fulfil all criteria above !
First app I tried and bought was ReadIt.ToMe : https://play.google.com/store/apps/deta ... t.tomefree
=> good one, doing the job for SMS, mails, which is what I wanted initially. I found out later that having also waze notifications would be cool, so I searched for another one.
Second app https://play.google.com/store/apps/deta ... udiobtplus
=> This is the one I am using currently and will show the details of my configuration.
First of all, you need to have you phone paired with you car. Yeah it is obvious but better saying it anyway !
Now we can run the app and configure it :
1/ here you can manage the service on your phone, and do a quick test to make sure the sound is forwarded to the car 2/ Let's go to the settings 3/ General Good point for this app is it won't take any phone ressources if there is no bluetooth device connected... and stop the service when the device disconnect.
4/ Notifications I have added a delay of one sec just to let the phone and the NG4 establish properly the connection before reading the notif.
With application name / title / content it can be a bit verbose, it is up to you

5/ Notifications : list of applications Just tick what application notification will be read on the NG4
6/ Notifications : TTS settings Sorry for this french screenshot, french ppl drive french cars you know

It is not the app itself, but the android parameter for text to speech (TTS). So you modify the voice there.
7/ Advanced Here I tick the "don't reset SCO" option, otherwise it take ages before the phone is connected to the NG4 ... not really convenient for a GPS app

Bonus app : https://play.google.com/store/apps/deta ... wifi_timer
As you may want to save your phone battery, here is a very simple app that turn on / off bluetooth (and wifi) based on a schedule. So the bluetooth is always on when I go to work (or come back home).
Regards,
Nicolas