SMS guides, walkthroughs, and error codes.

1024: Toll Free verification rejection - Disallowed: Alcohol promotions without age verification

Your Toll-Free number verification was rejected because the messaging program involves alcohol-related content but does not include a compliant 21+ age…

1023: Toll Free verification rejection - Disallowed: Non-federally compliant use case

Your Toll-Free number verification was rejected because the messaging use case does not comply with federal regulations…

1022: Toll Free verification rejection - Business Registration Number is Missing or Invalid

Your Toll-Free number verification was rejected because the business name or brand listed in the submission does…

1021: Toll Free verification rejection - High-risk domain issues

Your Toll-Free number verification was rejected because the website domain provided failed domain inspection checks and was…

1020: Toll Free verification rejection - Public URL shorteners not allowed

Your Toll-Free number verification was rejected because the sample message content includes links from public URL shortening…

1019: Toll Free verification rejection - Potential fraud risk

Your Toll-Free number verification was rejected because the submission was flagged as a potential fraud risk. Messaging…

1018: Toll Free verification rejection - High-risk domain reputation

Your Toll-Free number verification was rejected because the website domain included in the submission has been flagged…

1017: Toll Free verification rejection - SMS terms must be accessible and compliant

Your Toll-Free number verification was rejected because the SMS Terms and Conditions required for the messaging program…

1016: Toll Free verification rejection - Opt-in data cannot be shared with third parties

Your Toll-Free number verification was rejected because the submission suggests that SMS opt-in data or consent may…

1015: Toll Free verification rejection - Privacy policy mentions sharing opt-in data

Your Toll-Free number verification was rejected because the privacy policy indicates that SMS opt-in or personal data…

1014: Toll Free verification rejection - Privacy policy required for personal data collection

Your Toll-Free number verification was rejected because the submission does not include a valid or sufficient privacy…

1013: Toll Free verification rejection - Call-to-action missing required disclosures

Your Toll-Free number verification was rejected because the call-to-action (CTA) used to collect phone numbers does not…

1012: Toll Free verification rejection - Shopping cart reminders must follow specific guidelines

Your Toll-Free number verification was rejected because the submission includes shopping cart reminder messages but does not…

1011: Toll Free verification rejection - Double opt-in required for this use case

Your Toll-Free number verification was rejected because the messaging use case requires a double opt-in, but the…

1010: Toll Free verification rejection - Valid opt-in required for all submissions

Your Toll-Free number verification was rejected because the submission relies on an organizational or government consent exemption,…

1009: Toll Free verification rejection - Opt-in not sufficient: Language Unclear

Your Toll-Free number verification was rejected because the opt-in language does not clearly request or explain consent…

1008: Toll Free verification rejection - Age gate required for age-restricted content

Your Toll-Free number verification was rejected because the messaging use case involves age-restricted products or services, but…

1007: Toll Free verification rejection - Verbal consent script must be provided

Your Toll-Free number verification was rejected because the submission relies on verbal consent, but the required supporting…

1006: Toll Free verification rejection - Opt-in example must be complete and branded

Your Toll-Free number verification was rejected because the opt-in example provided did not contain enough clear or…

1005: Toll Free verification rejection - Opt-in URL not accessible

Your Toll-Free number verification was rejected because the opt-in example could not be accessed by reviewers. Messaging…

1004: Toll Free verification rejection - Pre-selected opt-in checkbox is not allowed

Your Toll-Free number verification was rejected because the opt-in process does not require users to actively provide…

1003: Toll Free verification rejection - Opt-in does not match use case

Your Toll-Free number verification was rejected because the opt-in language or consent method does not align with…

1002: Toll Free verification rejection - Opt-ins must clearly reflect end business

Your Toll-Free number verification was rejected because the opt-in experience does not clearly show the relationship between…

1001: Toll Free verification rejection - Opt-in must be optional, not required

Your Toll-Free number verification was reviewed and rejected, and messaging from this Toll-Free number is blocked until…

1000: Toll Free verification rejection - Single opt-in cannot cover multiple use cases

Your Toll-Free number verification was reviewed and rejected. Messaging from this Toll-Free number is blocked until the…

Forbidden SMS Message Categories in the US & Canada

When sending business SMS in the United States and Canada, compliance is critical. Mobile carriers enforce strict rules…

How to Monitor SMS Performance: Key Metrics Every Business Should Track

Monitoring SMS performance is essential for understanding how well your messaging campaigns are working, and where you can optimize…

How to Write a High-Quality SMS Campaign Description That Gets Approved

A campaign description is one of the most important parts of your SMS registration. Carriers rely heavily on…

Common Mistakes That Get Your SMS Registration Rejected

Submitting your SMS registration form is one of the most important steps in getting approved for A2P messaging.…

How to Properly Fill Out Your SMS Registration Form for Fast 10DLC Approval

A smooth 10DLC approval process starts with one thing: a correctly completed registration form. Carriers review every detail you…

The Future of SMS: Trends and Technologies Shaping 2026

How API-Based SMS Integration Can Streamline Your Operations

API-based SMS integration gives businesses a powerful way to automate communication, improve workflows, and deliver messages directly from…

Top SMS Marketing Mistakes Businesses Should Avoid

Introduction to Common SMS Marketing Mistakes SMS remains one of the most powerful communication channels for businesses, …

The SMB Guide to SMS Automation

Introduction to SMS Automation SMS automation helps small and medium businesses save time, improve communication, and deliver consistent…

Personalization in SMS Marketing: Strategies That Actually Work

Personalization has become one of the most powerful drivers of effective communication, and SMS is one of…

Introduction to A2P SMS

In an era where customers expect instant, clear, and reliable communication, businesses need messaging tools that deliver results…

SMS Appointment Reminders

Introduction to SMS Appointment Reminders Learn how businesses use SMS to reduce no-shows, streamline scheduling, and keep customers…

SMS vs. Email

Which Channel Delivers Better Results in 2025? Learn how SMS and email compare in performance, engagement, and business…

Why SMS Remains a Top Communication Channel

Why SMS Is Still So Effective SMS remains one of the most effective communication channels because of its…

Introduction to SMS for Support & Retention

Learn how businesses use SMS to improve customer support, increase satisfaction, and boost retention with fast, convenient, and…

Introduction to 10DLCs