iPhone Xr calls drop on 2018 Highlander with Toyota Entune - 1/12/2021

Thank you for responding.

The connections are dropped with I'm making calls - after 15 and 45 seconds. There are no issues with streaming music. The tech at the Toyota dealership told me to try pairing my phone with the car and to NOT sync contacts. This meant that I'd have to punch in a phone number. I tried this on a test call and it worked; however, the minute I synced my contacts, it reverted back to dropping calls again. I even turned off the "automatically update contacts" option on the car and it didn't make a difference.

I have a case on my phone. What would removing the case do?

I've also tried pairing the car with another iPhone and nothing gets dropped if contacts are not synced.

Thank you. I have reset/rebooted, done the Hokey Pokey and even turned the vehicle around and no luck. The phone does not disconnect from any other bluetooth device I use, including those not specifically designed for an Apple product. It's only the car and only when I am talking on the phone. I can play music until the cows come home but can't hold a conversation. The case I have is one suited for the phone I have and has no metal or magnetic parts on it nor do I have it resting in a metal/magnetic holder in my car. I've paid attention to incoming text messages, etc. to see if any of the symbols used in the message are interfering somehow (the dealer tech told me to go through all of my contacts and delete symbols to see if that made it better so I deleted all of the +'s in front of the +1 area code and still nothing but dropped calls), but I haven't gotten any text messages while I've made calls.

At first I blamed cellular dead spots but the calls were being dropped in areas that I know are not dead spots nor were they dropped at the same time and in the same locations.

Any other thoughts?

Thank you.