Overview
SHAKEN/STIR technology helps protect your business calls from being marked as spam or “Scam Likely” by verifying caller authenticity. Understanding and implementing proper caller verification protects your business reputation and ensures your calls reach customers successfully.SHAKEN/STIR protection is available for US business numbers through Quo, formerly OpenPhone’s Trust Center. Registration helps establish caller legitimacy with major carriers.
Understanding call reputation issues
Why numbers get flagged
Previous ownership impact: Phone numbers often carry reputation from previous owners, leading to inherited spam labels that don’t reflect your business practices. Common flagging triggers:- Previous owner’s calling patterns or complaints
- Sudden spikes in outbound call volume
- Consumer fraud or spam reports
- Inconsistent calling behavior patterns

Impact on business communications
Negative consequences:- Reduced call answer rates
- Damaged business credibility
- Lost customer opportunities
- Decreased communication effectiveness
Clearing spam labels for US numbers
Free Caller Registry registration
Quick registration process: Access through Quo’s Trust Center for streamlined registration that clears “Scam Likely” labels faster than traditional long-form processes.
- Navigate to Settings → Trust Center in Quo
- Complete Clear Scam Likely labeling section
- Provide accurate business information
- Submit registration to major US carriers
Required information
Calling company details:- Business phone number: Your Quo business number
- Business name: Official registered business name
- Business address: Physical business location
- Provider name: Quo (your service provider)
- Provider relationship: Business phone service
Carrier distribution
Registry reaches major carriers:- T-Mobile
- Verizon
- Sprint
- US Cellular
- AT&T
- Other participating carriers
Clearing spam labels for Canadian numbers
Hiya spam detection removal:- Visit Hiya support portal
- Complete spam removal form
- Provide business verification details
- Wait for processing and confirmation
- Also registers Canadian numbers with STIR/SHAKEN
- Provides broader carrier recognition
- Helps prevent future spam labeling
- Complies with FCC fraud reduction protocols
SHAKEN/STIR technology
How SHAKEN/STIR works
Authentication process:- Originating carrier signs call with cryptographic signature
- Call routing preserves authentication through network
- Terminating carrier verifies signature authenticity
- Display decision shows verified or unverified status
- A (Full): Complete verification of caller and number
- B (Partial): Caller verified, number relationship uncertain
- C (Gateway): Originating carrier cannot verify caller
Business pathway requirements
STIR/SHAKEN through Quo:- Available for business customers with tax ID
- Requires US Carrier Registration completion
- Provides enhanced call authentication
- Reduces fraud and spam likelihood
Comprehensive protection strategy
Step 1: FCC Registration Complete US Carrier Registration through Quo Trust Center:- Provide business tax ID number
- Submit business verification documents
- Enable STIR/SHAKEN authentication
- Maintain compliant calling practices
- Complete business information accurately
- Verify ownership of phone numbers
- Establish positive caller reputation
- Monitor registration status
Compliance best practices
Calling behavior guidelines:- Consistent patterns: Maintain regular calling volumes and schedules
- Legal compliance: Follow all relevant laws and regulations
- Terms adherence: Comply with Quo Terms of Service
- Consumer respect: Honor opt-out requests and preferences
- Prevent sudden call volume spikes
- Avoid aggressive calling patterns
- Respond to consumer complaints promptly
- Maintain accurate business information
Ongoing maintenance
Reputation monitoring:- Regular check of number reputation status
- Monitor customer feedback about call display
- Address spam reports immediately
- Update registration information when business changes
- Annual registration renewal
- Business information updates
- Calling pattern optimization
- Customer education about legitimate calls
Troubleshooting spam labels
When customers report spam labels:- Verify registration status in Trust Center
- Check compliance with calling guidelines
- Submit removal requests through appropriate channels
- Communicate with customers about verification process
- Contact Quo support for escalation
- Provide evidence of legitimate business operations
- Document customer complaints and resolution efforts
- Consider number replacement if severely compromised
- Implement call warming for new numbers
- Educate customers about expecting calls
- Use branded caller ID when available
- Maintain consistent business communications
Best practices summary
Essential registrations:- Complete US Carrier Registration in Trust Center
- Submit Free Caller Registry business information
- Enable STIR/SHAKEN authentication
- Update business details when changed
- Monitor registration status regularly
- Maintain consistent calling patterns
- Honor all legal requirements
- Respect consumer preferences
- Document legitimate business purpose
- Respond to complaints promptly
- Check number reputation monthly
- Update registrations annually
- Monitor customer feedback
- Address labeling issues immediately
- Keep business information current