I'm struggling to find reviews of the 3S online.
I've got a roidmi 2s, but have been finding the connection to my 2004 x-trail keeps dropping out. The aluminium foil hack worked for me for a few weeks but has now stopped working reliably.
Has anyone purchased the new 3S? How is it? Does it still put phone calls through the car speaker? How does talking work as the 3S doesn't have a microphone as far as I can tell?
Nope.
I already have an FM transmitter built into my console, its weird but it works.
You can find some impressions about it online from OzB:
https://www.ozbargain.com.au/node/315024
Personally, I think you should take the plunge and the the RM3S, its only $25-$35. Try it out.
And if it doesn't work, #1 let other buyers know, #2 let Banggood/Xiaomi/PayPal know, #3 get a refund or sell it.
If it works, excellent. Now you can get rid of your old M2S.