Hey thanks for the link! I searched high and low looking. Found a couple that were supposed to work but they didnt install.I have the same model but different problems. Do you have any suggestion for my problems?
1. The sim card is not working. Inserted but the box does not detect the sim card. Seller don't response for this.
2. Voice call through 'Line' application via bluetooth is terrible, echo and suppress. Is this from the background noise suppression?
For your question, here is where I get the updated firmware. It works well. Make sure that you download from the 'Carplay box' -> 'Carplay box 665' in the link below.
SYSTEMUPDATES for Carplay AI BOX/HDMI Box with QC665www.mic-autoradio.com
Don't use from the 'Autoradi' (car radio) as it will brick the box.
I havent tried a sim in mine yet but will in a few days, just waiting on the little converter since my sim is the nano version. I'll let you know if it works. I havent tried making a call through it but can give that a try too. On a work trip until Friday, I'll let ya know by the weekend.