I'm experiencing issues with didRegisterForRemoteNotificationsWithDeviceToken not being called on iOS 18.1.1. Here's what I've tried: Basic Setup: Properly configured UNUserNotificationCenter Requested permissions with requestAuthorization(options:) Registered for remote notifications with registerForRemoteNotifications() Environment: Xcode 16.3 iOS 18.1.1 (physical device) Firebase (tried with and without it) Troubleshooting: Verified provisioning profile includes Push Notifications Confirmed APNs certificate is valid Disabled Firebase's method swizzling Tested on a clean project (works fine) Checked device logs (no relevant errors) Code Snippet: // In AppDelegate.swift public func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) { let tokenParts = deviceToken.map { data in String(format: "%02.2hhx", data) } let tokenString = tokenParts.joined() print("📱 Device Token: \(tokenString)") // Store the token for your backend UserDefaults.standard.set(tokenString, forKey: "deviceToken") // Send to backend Task { do { try await APIService.shared.setDeviceToken(tokenString) } catch { print("❌ [AppDelegate] Failed to send device token to backend: \(error)") } } } public func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]? = nil) -> Bool { // IMPORTANT: First handle push notification registration UNUserNotificationCenter.current().delegate = self // Request notification permissions self.requestNotificationPermissions() // Register for remote notifications DispatchQueue.main.async { UIApplication.shared.registerForRemoteNotifications() } return true } private func requestNotificationPermissions() { UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .badge, .sound]) { granted, error in guard granted else { print("❌ Notification permission not granted") return } print("✅ Notification permission granted") } }