📱 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.