Call Prefix *67 *82 *70 #31#
Add prefixes like *67, *82, *70 or #31# instantly. Manage caller ID with widgets
About Call Prefix *67 *82 *70 #31#
📱 Call Prefix – *67, 82, 70, #31#
Need to add a prefix, suffix, or special code before calling?
With Call Prefix, you don’t need to edit your contacts anymore. The app automatically inserts codes like *67, *82, *70, 10-10-XXX, #31#, and more — instantly applied to your outgoing calls.
✨ Key Features
➕ Automatic prefixes and suffixes without touching your contacts
📲 Smart widgets: manage prefixes, suffixes, and caller ID directly from your home screen
🕵️ Anonymous calls: quickly enable/disable *67 or #31# to hide your number
☎️ Per-call options:
*67 → Hide Caller ID
*82 → Show Caller ID (unblock)
*70 → Disable Call Waiting
10-10-XXX → Carrier dial-around codes
⏸️ Skip operator voice messages (where supported) after a few seconds
🌍 International control: remove or replace “+” and “00” for easier international dialing
🆘 Emergency numbers automatically excluded for safety
🔐 Privacy & Security
❌ No access to your contacts
❌ No personal data collected
✅ All numbers are processed locally on your device
💎 Usage Modes
🎁 Free trial: 24 hours of full access after first install (no charge)
🎬 Rewarded ads: watch a short video to extend usage by 1 day (max 5/day, every 30 min)
💳 Premium: one-time payment ($4.99) for lifetime unlimited use (no subscription, no auto-renewal)
⚙️ Requirements
📱 Android 10 or higher (API 29+)
⚙️ Must be set as Call Redirection Manager
🔋 Recommended: exclude from battery optimization
📌 Compatibility
✅ Optimized for: Samsung, Google Pixel, Motorola, OnePlus, Xiaomi/Redmi, Huawei/Honor, Vivo
❌ Not compatible: Oppo and Realme (system-level block)
⚠️ Known issue: some Samsung/Xiaomi devices on Android 15 handle pauses (commas) differently, which may affect skipping operator messages
🔎 Common Use Cases
Hide your number with *67 or #31#
Show your number again with *82
Disable call waiting with *70 during important calls
Use 10-10-XXX codes for alternative carriers
Manage everything directly from widgets
⭐ Call Prefix is the easiest, fastest, and safest way to manage prefixes, hide or show caller ID, and handle special dialing codes — without touching your contacts.
⚠️ This app is independent and not affiliated with any carrier. Codes and services may vary by country, region, and mobile operator.
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