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in iOS 17 (21A5326A) audioSession.setCategory(.playAndRecord, mode: .default,options: .allowBluetooth) does not set input to bluetooth. In iOS 16 it does. Here the steps to reproduce: Create project with storyboard. in info.plist add NSMicrophoneUsageDescription Your microphone will be used to record your speech when you press the "Start Recording" button. put in ViewController: import UIKit import Speech class ViewController: UIViewController { override func viewDidLoad() { super.viewDidLoad() // Do any additional setup after loading the view. } override public func viewDidAppear(_ animated: Bool) { super.viewDidAppear(animated) AVAudioSession.sharedInstance().requestRecordPermission { granted in } } func startAudioSession(){ let audioSession = AVAudioSession.sharedInstance() do { try audioSession.setCategory(.playAndRecord, mode: .default,options: .allowBluetooth) try audioSession.setActive(true,options: .notifyOthersOnDeactivation) print(audioSession.currentRoute.description) } catch { } } @IBAction func btnTap(_ sender: UIButton) { startAudioSession() } } put button on the Main.storyboard and link it to btnTap Connect bluetooth headset to iphone, start the App and tap button. in iOS 16 see the current route - bluetooth. in iOS 17 see the current route - speaker