iPhone 16+ No wifi or cellular

Since both Wi-Fi and cellular stopped working immediately after the drop, I'd be more suspicious of logic-board damage than two separate antenna failures.

On iPhones, a drop can damage board connections or the cellular/Wi-Fi circuitry. If Wi-Fi is greyed out in Settings or the phone shows missing cellular/baseband information, that's an even stronger indication of a board-level problem.

Before opening it, check the panic logs. An iPhone panic log analysis could help identify whether the failure is related to Wi-Fi, baseband, or another hardware subsystem.