diff --git a/README.md b/README.md
index 2ae6dd0..73215f4 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@ SMSBower Phone Fill Tool
 
 本版已集成 FlowPilot 同款自动切号机制：
 - 悬浮窗打开后默认开启“自动切号：开”。
-- 页面提示“该电话/手机号已被使用、已绑定、已注册”时，插件会自动识别并切换下一个号码；旧号按被拒原因释放，新号自动填入并复制。
+- 页面提示“该电话/手机号已被使用、已绑定、已注册”时，只要确认是当前新号码触发的错误，插件会自动切换下一个号码；旧号按被拒原因释放，新号自动填入并复制。
 - 页面提示“无法向此电话号码发送验证码”等发送失败时，插件会自动按可恢复失败换号。
 - “检测报错换号”和“已使用换号”仍保留为手动兜底按钮。
 - 仍然只负责填号/查码/复制，不自动点击目标页面继续按钮。
diff --git a/content.js b/content.js
index 0aa1c2b..872fc34 100644
--- a/content.js
+++ b/content.js
@@ -33,10 +33,8 @@
   let autoRotateTimer = null;
   let autoRotateInFlight = false;
   let autoRotateEnabled = true;
-  let lastAutoRotateSignature = '';
-  let lastAutoRotateAt = 0;
+  let lastErroredPhoneNumber = '';
   const AUTO_ROTATE_DEBOUNCE_MS = 800;
-  const AUTO_ROTATE_COOLDOWN_MS = 8000;
 
   function stopCodePolling() {
     codePollToken += 1;
@@ -170,6 +168,7 @@
       await copyText(phone);
       fillPhone(phone);
       $('.sb-current-phone').textContent = phone;
+      lastErroredPhoneNumber = '';
       $('.sb-current-id').textContent = res.activation.activationId;
       const codeNode = $('.sb-current-code');
       if (codeNode) codeNode.textContent = '无';
@@ -195,25 +194,21 @@
     btn.classList.toggle('sb-auto-on', autoRotateEnabled);
   }
 
-  function buildAutoRotateSignature(reason, text) {
-    const compact = String(text || '').replace(/\s+/g, ' ').trim();
-    return `${reason}:${compact.slice(-220)}`;
+  function getCurrentPhoneNumber() {
+    const phone = $('.sb-current-phone')?.textContent || latestSettings?.activeActivation?.phoneNumber || '';
+    return String(phone).trim();
   }
 
   async function rotateFromClassifiedError(classified, source = 'manual') {
-    const text = getPageTextForPhoneError();
-    const signature = buildAutoRotateSignature(classified.reason, text);
-    const now = Date.now();
+    const currentPhone = getCurrentPhoneNumber();
     if (autoRotateInFlight) return false;
-    if (source === 'auto' && signature === lastAutoRotateSignature && now - lastAutoRotateAt < AUTO_ROTATE_COOLDOWN_MS) {
-      return false;
-    }
+    if (source === 'auto' && (!currentPhone || currentPhone === '无')) return false;
+    if (source === 'auto' && currentPhone === lastErroredPhoneNumber) return false;
     autoRotateInFlight = true;
-    lastAutoRotateSignature = signature;
-    lastAutoRotateAt = now;
     try {
+      lastErroredPhoneNumber = currentPhone;
       setStatus(source === 'auto'
-        ? `检测到${classified.reason === 'phone_number_used' ? '号码已使用' : '验证码发送失败'}，正在自动切号...`
+        ? `当前号码 ${currentPhone} 触发${classified.reason === 'phone_number_used' ? '已使用' : '验证码发送失败'}，正在自动切下一个号...`
         : '检测到手机号错误，正在切号...');
       await fetchAndFill({ reason: classified.reason, releaseAction: classified.releaseAction, skipSave: true });
       return true;