About three weeks whenever my iPhone 8 (iOS 11.3) connected via bluetooth to my car it would say "phone book update failed" over the car speaker. After unsuccessful attempts to fix this, I chose to forget this device with the intent of repairing the phone to the car. Now, the phone will not see the car or the car will not see the phone. I have deleted the phone from the car also. I have reset network setting multiple times. Did a hard reset and a soft reset. Turned phone on / off. Turned Bluetooth on / off. I reset the radio / Infotainment System with no luck. I tried a different iPhone 8 that was never paired with the vehicle and it paired right away with no issues. I called Chevrolet and they said that since other phones were able to be paired with no issues the problem is with my iPhone 8 software. How do I unforget the vehicle in the iOS Bluetooth settings? Is there a know flaw with iOS Bluetooth forgetting devices? Any help would be greatly appreciated. Thank you.