NumBuster lets you block unwanted calls and SMS. You can manage your blacklist and set up rules to automatically filter out spam and suspicious phone numbers.

How to add a phone number to the blacklist?

During a call: Tap the Block button on the NumBuster incoming call screen. The phone number will be immediately added to your blacklist.

From your contacts: Open the contact list on your smartphone and select the phone number you want to block. Tap the Block icon next to the contact.

From the phone number page: Search for the phone number in NumBuster. Open the phone number’s profile and tap the Block icon in the bottom panel.

How to set up automatic blocking rules?

You can set general rules for NumBuster to automatically filter calls and messages. Go to Settings → Blocking Settings and turn on the relevant toggle:

• SMS Blocking: Completely blocks SMS from phone numbers in your blacklist.
• Unknown numbers: Blocks all calls from phone numbers not in your contact list.
• Block international calls: Rejects all calls coming from other countries.
• Template blocking: This tool lets you block entire series of phone numbers. To do this, tap Add rule and set a blocking template without spaces or special characters (for example, 7985 or 799912).