diff --git a/apps/mobile/app/(app)/unlock.tsx b/apps/mobile/app/(app)/unlock.tsx
new file mode 100644
index 0000000..932a58b
--- /dev/null
+++ b/apps/mobile/app/(app)/unlock.tsx
@@ -0,0 +1,194 @@
+import { useRouter } from 'expo-router';
+import { useState } from 'react';
+import {
+  ActivityIndicator,
+  Pressable,
+  StyleSheet,
+  Text,
+  View,
+} from 'react-native';
+
+import { PinInput } from '../../components/PinInput';
+import { useAuth } from '../../lib/authContext';
+import { loadOrUnlockUserKey, resetIdentity } from '../../lib/userIdentity';
+import { colors } from '../../theme/colors';
+
+type Mode = 'pin' | 'recovery';
+
+export default function UnlockScreen() {
+  const router = useRouter();
+  const { userId, userKeyState, refreshUserKeyState } = useAuth();
+  const [mode, setMode] = useState<Mode>('pin');
+  const [pin, setPin] = useState('');
+  const [recovery, setRecovery] = useState('');
+  const [submitting, setSubmitting] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  const locked =
+    userKeyState.status === 'needs-unlock' && userKeyState.lockedUntil !== null;
+  const hasRecovery =
+    userKeyState.status === 'needs-unlock' ? userKeyState.hasRecovery : false;
+
+  async function attempt(value: string, isRecoveryCode: boolean) {
+    if (!userId) return;
+    setSubmitting(true);
+    setError(null);
+    try {
+      const out = await loadOrUnlockUserKey({ userId, pin: value, isRecoveryCode });
+      if (out.kind === 'unlocked') {
+        await refreshUserKeyState();
+        router.replace('/(app)/chats');
+        return;
+      }
+      if (out.kind === 'locked') {
+        setError('Konto bis ' + new Date(out.lockedUntil).toLocaleString('de-DE') + ' gesperrt.');
+        await refreshUserKeyState();
+        return;
+      }
+      setError('Kein Identitäts-Datensatz auf dem Server.');
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Entsperren fehlgeschlagen');
+      if (isRecoveryCode) setRecovery('');
+      else setPin('');
+      await refreshUserKeyState();
+    } finally {
+      setSubmitting(false);
+    }
+  }
+
+  async function handleReset() {
+    if (!userId) return;
+    setSubmitting(true);
+    setError(null);
+    try {
+      await resetIdentity({ userId, pin: '000000' });
+      await refreshUserKeyState();
+      router.replace('/(app)/setup');
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Reset fehlgeschlagen');
+    } finally {
+      setSubmitting(false);
+    }
+  }
+
+  return (
+    <View style={styles.container}>
+      <Text style={styles.title}>Netralax entsperren</Text>
+      <View style={styles.tabs}>
+        <Pressable
+          style={[styles.tab, mode === 'pin' && styles.tabActive]}
+          onPress={() => setMode('pin')}
+        >
+          <Text style={[styles.tabText, mode === 'pin' && styles.tabTextActive]}>PIN</Text>
+        </Pressable>
+        <Pressable
+          style={[styles.tab, mode === 'recovery' && styles.tabActive]}
+          disabled={!hasRecovery}
+          onPress={() => setMode('recovery')}
+        >
+          <Text style={[styles.tabText, mode === 'recovery' && styles.tabTextActive]}>
+            Recovery-Code
+          </Text>
+        </Pressable>
+      </View>
+
+      {mode === 'pin' ? (
+        <>
+          <PinInput
+            value={pin}
+            onChange={setPin}
+            ariaLabel="PIN eingeben"
+            autoFocus
+            disabled={locked || submitting}
+          />
+          <Pressable
+            style={[styles.primary, (pin.length !== 6 || locked || submitting) && styles.disabled]}
+            disabled={pin.length !== 6 || locked || submitting}
+            onPress={() => attempt(pin, false)}
+          >
+            {submitting ? (
+              <ActivityIndicator color={colors.text} />
+            ) : (
+              <Text style={styles.primaryText}>Entsperren</Text>
+            )}
+          </Pressable>
+        </>
+      ) : (
+        <>
+          <Text style={styles.subtitle}>Recovery-Code eingeben (mit oder ohne Bindestriche):</Text>
+          <Text style={styles.recoveryDisplay} selectable>
+            {recovery}
+          </Text>
+          <Pressable
+            style={[styles.primary, recovery.length === 0 && styles.disabled]}
+            disabled={recovery.length === 0 || submitting}
+            onPress={() => attempt(recovery, true)}
+          >
+            {submitting ? (
+              <ActivityIndicator color={colors.text} />
+            ) : (
+              <Text style={styles.primaryText}>Mit Recovery entsperren</Text>
+            )}
+          </Pressable>
+        </>
+      )}
+
+      {error && <Text style={styles.error}>{error}</Text>}
+
+      {locked && (
+        <Pressable style={styles.danger} onPress={handleReset}>
+          <Text style={styles.dangerText}>Identität zurücksetzen (alte Chats verloren)</Text>
+        </Pressable>
+      )}
+    </View>
+  );
+}
+
+const styles = StyleSheet.create({
+  container: {
+    flex: 1,
+    backgroundColor: colors.bg,
+    paddingTop: 64,
+    paddingHorizontal: 24,
+    gap: 16,
+  },
+  title: { color: colors.text, fontSize: 22, fontWeight: '700' },
+  subtitle: { color: colors.textMuted, fontSize: 13 },
+  tabs: { flexDirection: 'row', gap: 8 },
+  tab: {
+    flex: 1,
+    paddingVertical: 10,
+    alignItems: 'center',
+    borderBottomWidth: 2,
+    borderBottomColor: colors.border,
+  },
+  tabActive: { borderBottomColor: colors.accent },
+  tabText: { color: colors.textMuted, fontWeight: '600' },
+  tabTextActive: { color: colors.text },
+  recoveryDisplay: {
+    color: colors.text,
+    fontFamily: 'Courier',
+    fontSize: 18,
+    letterSpacing: 1.5,
+    backgroundColor: colors.surface,
+    padding: 16,
+    borderRadius: 10,
+  },
+  primary: {
+    backgroundColor: colors.accent,
+    paddingVertical: 14,
+    borderRadius: 12,
+    alignItems: 'center',
+  },
+  primaryText: { color: colors.text, fontWeight: '700' },
+  disabled: { opacity: 0.5 },
+  danger: {
+    paddingVertical: 12,
+    alignItems: 'center',
+    borderColor: colors.danger,
+    borderWidth: 1,
+    borderRadius: 12,
+  },
+  dangerText: { color: colors.danger, fontWeight: '700' },
+  error: { color: colors.danger, fontSize: 13 },
+});