Test one phone after the system has fully booted, with Bluetooth and Wi-Fi enabled. Compare wired operation if supported to see whether the instability is specific to wireless projection.
Use normal shutdown procedures, keep hardware dry and stop if you see damage, overheating, burning smells or any electrical risk.
Checks to perform in the right order
Confirm the exact symptom
Record whether the drop affects CarPlay, Android Auto or both wireless modes.
Start with the simplest reversible check
Remove only the vehicle's stale phone entry and perform one fresh pairing while parked.
Change one variable at a time
Compare another phone and note Hyundai system version, connection delay and exact dropout pattern before support.
Cross-test before resetting anything
Write down what changes and what stays the same. A controlled comparison is more useful than several resets performed together.
Escalate with useful evidence
If the problem survives the safe checks, record the model, software version, warning shown and tests already performed before contacting support.
How to narrow down the cause
- A change after one controlled test is a useful clue; keep the other variables unchanged.
- If a second compatible device works in the same setup, focus on the first device rather than replacing everything.
- Stop if there is heat, liquid, physical damage, burning smell or electrical risk.
Official sources used
Procedures can vary by model, firmware or hardware revision. When your device differs, use the official manufacturer documentation for that exact model.