diff --git a/.changeset/native-sdk-4-2.md b/.changeset/native-sdk-4-2.md
new file mode 100644
index 0000000..7694039
--- /dev/null
+++ b/.changeset/native-sdk-4-2.md
@@ -0,0 +1,5 @@
+---
+"fingerprint_flutter": minor
+---
+
+Android and iOS: use native Fingerprint SDK 4.2.x. It collects new signals and improves performance. On Android, it also returns an error instead of crashing when SDK initialization fails.
diff --git a/android/consumer-rules.pro b/android/consumer-rules.pro
index 3cc50ff..3aa7bfe 100644
--- a/android/consumer-rules.pro
+++ b/android/consumer-rules.pro
@@ -1,4 +1,4 @@
-# Stopgap for gaps in Fingerprint Android SDK 4.1.x consumer rules. Remove once the SDK ships them.
+# Stopgap for gaps in Fingerprint Android SDK 4.1.x and 4.2.x consumer rules. Remove once the SDK ships them.
 # https://developer.android.com/build/shrink-code#configuration-files
 
 # The SDK references Play Services location without depending on it. R8 fails with "Missing class".
diff --git a/android/fingerprint.gradle b/android/fingerprint.gradle
index 09e19e7..a42aaf2 100644
--- a/android/fingerprint.gradle
+++ b/android/fingerprint.gradle
@@ -1,6 +1,6 @@
 // Patch releases only, same as iOS in ios/fingerprint_flutter/Package.swift.
 // Take each native minor on purpose.
-ext.fingerprint_native_sdk_version = "[4.1.0, 4.2.0)"
+ext.fingerprint_native_sdk_version = "[4.2.0, 4.3.0)"
 
 task printFingerprintNativeSDKVersion {
     doLast {
diff --git a/android/src/test/kotlin/com/fingerprint/flutter/FingerprintHostApiImplTest.kt b/android/src/test/kotlin/com/fingerprint/flutter/FingerprintHostApiImplTest.kt
index d3c4c60..8e09095 100644
--- a/android/src/test/kotlin/com/fingerprint/flutter/FingerprintHostApiImplTest.kt
+++ b/android/src/test/kotlin/com/fingerprint/flutter/FingerprintHostApiImplTest.kt
@@ -1,7 +1,7 @@
 package com.fingerprint.flutter
 
 import android.content.Context
-import com.fingerprint.android.ApiKeyRequired
+import com.fingerprint.android.ApiKeyNotFound
 import com.fingerprint.android.Failed
 import com.fingerprint.android.Fingerprint
 import com.fingerprint.android.FingerprintResponse
@@ -19,12 +19,14 @@ class FingerprintHostApiImplTest {
   @Test
   fun mapsErrorTypesByInstanceNotSimpleName() {
     val cases = listOf(
-      ApiKeyRequired("e1", "msg") to "public_api_key_required",
+      // Some SDK error classes throw IllegalAccessError when created on the
+      // desktop JVM (works on ART). The SDK obfuscator breaks their static
+      // initializer, and which classes it breaks changes with each release.
+      // These load on SDK 4.1.0 and 4.2.0.
+      ApiKeyNotFound("e1", "msg") to "public_api_key_not_found",
       Failed("e2", "fail") to "failed",
       RequestTimeout("e3", "timeout") to "request_read_timeout",
       NetworkUnavailableError() to "network_error",
-      // NetworkError is left out: its obfuscated static initializer in SDK 4.1.0
-      // throws IllegalAccessError on the desktop JVM (works on ART).
     )
     for ((nativeError, expectedCode) in cases) {
       val api = hostApi { _, _ ->
diff --git a/android/src/test/kotlin/com/fingerprint/flutter/FingerprintNativeErrorTest.kt b/android/src/test/kotlin/com/fingerprint/flutter/FingerprintNativeErrorTest.kt
index b4628d3..bdf3bff 100644
--- a/android/src/test/kotlin/com/fingerprint/flutter/FingerprintNativeErrorTest.kt
+++ b/android/src/test/kotlin/com/fingerprint/flutter/FingerprintNativeErrorTest.kt
@@ -1,24 +1,25 @@
 package com.fingerprint.flutter
 
-import com.fingerprint.android.ApiKeyRequired
+import com.fingerprint.android.ApiKeyNotFound
 import com.fingerprint.android.StateNotReady
 import org.junit.Assert.assertEquals
 import org.junit.Assert.assertNull
 import org.junit.Test
 
+// Error types here must load on the desktop JVM, see FingerprintHostApiImplTest.
 class FingerprintNativeErrorTest {
   @Test
   fun stripsUnknownEventIdAndDescription() {
-    val flutterError = toFlutterError(ApiKeyRequired("Unknown", "Unknown"))
-    assertEquals("public_api_key_required", flutterError.code)
+    val flutterError = toFlutterError(ApiKeyNotFound("Unknown", "Unknown"))
+    assertEquals("public_api_key_not_found", flutterError.code)
     assertNull(flutterError.message)
     assertNull(flutterError.details)
   }
 
   @Test
   fun keepsRealEventIdInDetails() {
-    val flutterError = toFlutterError(ApiKeyRequired("evt-123", "need key"))
-    assertEquals("public_api_key_required", flutterError.code)
+    val flutterError = toFlutterError(ApiKeyNotFound("evt-123", "need key"))
+    assertEquals("public_api_key_not_found", flutterError.code)
     assertEquals("need key", flutterError.message)
     assertEquals("evt-123", flutterError.details)
   }
diff --git a/ios/fingerprint_flutter/Package.swift b/ios/fingerprint_flutter/Package.swift
index be0f1c2..cd7b69f 100644
--- a/ios/fingerprint_flutter/Package.swift
+++ b/ios/fingerprint_flutter/Package.swift
@@ -21,7 +21,7 @@ let package = Package(
         // pulled from users once a floating range allows it. Take each minor
         // on purpose. Example: 2.8.0 caused App Store rejections.
         // https://github.com/fingerprintjs/flutter/issues/92
-        .package(url: "https://github.com/fingerprintjs/fingerprint-ios", .upToNextMinor(from: "4.1.0"))
+        .package(url: "https://github.com/fingerprintjs/fingerprint-ios", .upToNextMinor(from: "4.2.0"))
     ],
     targets: [
         .target(