Contacts: Block Unknown Number

Phone book & caller ID. Block unknown callers, spam calls and robocalls in 1 tap

Tired of your phone ringing from numbers you don't recognise? Contacts: Block Unknown Number is a phone book, caller ID and call blocker in one — block unknown numbers automatically, see who called you, and keep every contact organised in a clean, fast contacts app.

Most spam starts with an unknown number. Turn on the blocker once and calls from any number not saved in your contacts are silenced or blocked before your phone rings. No more robocalls at dinner. No more wondering who called me from that unknown caller ID.

🚫 BLOCK UNKNOWN NUMBERS AUTOMATICALLY
- One switch blocks every call from a number not in your phone book
- Choose to block completely or silence unknown callers so they never ring
- Blocked calls still appear in your call log, so you never miss something real
- Block private numbers and hidden caller ID calls
- Build a blacklist: block any number permanently in one tap
- Block number ranges by starting digits, or block a single number instantly
- Whitelist the people who matter so they always get through

🛡️ SPAM CALL BLOCKER & ROBOCALL PROTECTION
- Suspected spam calls and robocalls are flagged before you answer
- Block telemarketers, scam calls and unwanted calls for good
- Block a whole range of numbers by starting digits — stop a spam wave at once
- Review everything you blocked and unblock anytime

🔍 CALLER ID — SEE WHO CALLED ME
- Caller ID shows who is calling before you pick up
- Check any unknown number in your call history
- Stop calling back numbers you don't recognise

📇 PHONE BOOK & CONTACTS MANAGER
- All your contacts in one clean phonebook with A–Z fast scroll
- Sync with your Google account so you never lose a number
- Find and merge duplicates in one tap
- Backup keeps your phone book safe when you switch phones
- Create groups, favourites and frequently used numbers
- Share, edit and organise any contact in seconds

📞 FAST DIALER & KEYPAD
- Quick dialer with T9 smart search — type a few letters, call instantly
- Speed dial your favourite people straight from the keypad
- Clean in-call screen with mute, keypad and speaker controls
- Quick replies when you can't talk: send "Can I call you later?" in one tap

🕑 CALL HISTORY & CALL LOG
- Full call history: missed, incoming, outgoing, blocked — filtered in one tap
- Call log with talk time, so you always know who called and when
- Redial recent numbers instantly

🎨 MADE FOR EVERYDAY USE
- Light theme, dark theme or system default
- Works as your default phone app and dialer
- Light, fast and battery-friendly — opens instantly
- Your privacy respected: contacts and call data stay on your device

WHY CHOOSE THIS CALL BLOCKER APP?
Most call blocker apps make you upload your contacts or pay before they block anything. Most contacts apps have no blocking at all. This app does both — a proper phone book and a real blocker for unknown numbers — without sending your contact list anywhere.

Whether you need a contacts app to organise thousands of phone contacts, a caller ID to unmask an unknown caller, or a call blocker to stop spam calls and robocalls for good, this app handles all three.

Download Contacts: Block Unknown Number and let your phone ring only when it should.

Note: The app may request default phone handler permission to manage and block calls. Call history access is used only to show your call log. Contacts and call information stay on your device and are never uploaded to any server.