# SMS Verification

### About service

SMS verification helps you confirm **phone ownership** during onboarding. ComplyCube generates **time-bound one-time passwords (OTP)**, delivers them through global carrier routes, and validates submissions with anti-abuse controls.

### Common use cases <a href="#common-use-cases" id="common-use-cases"></a>

Use SMS OTP verification anywhere the phone number is a key identifier:

* **KYC onboarding**: Confirm the customer controls the number before deeper checks.
* **Sign-up and login verification**: Reduce fake sign-ups with a friction-light OTP challenge.
* **Transaction and settings changes**: Re-verify phone ownership before sensitive actions.

### How it works

1. A flow initiates SMS Verification for the customer’s mobile number.
2. ComplyCube sends an OTP to the customer via SMS.
3. The customer enters the OTP in the verification step.
4. ComplyCube validates the code before the verification flow continues.

### Country coverage

ComplyCube supports SMS delivery and OTP validation in **over 230 countries and territories**.

Coverage is grouped into **eight service tiers**. Tiers reflect regional carrier characteristics and delivery rules. They help set routing and deliverability expectations.

<table><thead><tr><th width="83.296875">Tier</th><th>Countries</th></tr></thead><tbody><tr><td><strong>T1</strong></td><td>Australia, Bahrain, Brazil, Brunei, Canada, Chile, China, Christmas Island, Cocos (Keeling) Islands, Colombia, Costa Rica, Czech Republic, Denmark, Faroe Islands, France, Greece, Greenland, Guam, Guernsey, Hong Kong, Iceland, Ireland, Isle of Man, Jersey, Korea (Republic of), Latvia, Liechtenstein, Lithuania, Macao, Malta, Micronesia, Namibia, Norfolk Island, Northern Mariana Islands, Norway, Poland, Portugal, Puerto Rico, Romania, Singapore, Svalbard and Jan Mayen, Sweden, Switzerland, Thailand, Turkey, United Kingdom, United States</td></tr><tr><td><strong>T2</strong></td><td>Åland Islands, Albania, Andorra, Antarctica, Argentina, Austria, Bahamas, Belgium, Botswana, Croatia, Cyprus, Dominican Republic, Eritrea, Estonia, Falkland Islands, Finland, Germany, Gibraltar, Hungary, India, Italy, Japan, Luxembourg, Moldova, Netherlands, New Zealand, Nicaragua, Paraguay, San Marino, São Tomé and Príncipe, Slovakia, Solomon Islands, South Africa, Spain, Taiwan, United Arab Emirates, Uruguay, Wallis and Futuna</td></tr><tr><td><strong>T3</strong></td><td>American Samoa, Anguilla, Antigua and Barbuda, Aruba, Bermuda, Bolivia, Bulgaria, Burkina Faso, Cape Verde, Cook Islands, Djibouti, Dominica, DR Congo, East Timor, Fiji, French Guiana, French Polynesia, French Southern Territories, Gambia, Georgia, Guadeloupe, Kenya, Kiribati, Macedonia, Martinique, Mauritius, Marshall Islands, Mayotte, Mexico, Monaco, Montenegro, Morocco, New Caledonia, Niue, Oman, Palau, Panama, Philippines, Réunion, Saudi Arabia, Slovenia, Saint Kitts and Nevis, Saint Lucia, Saint Pierre and Miquelon, Swaziland (Eswatini), Tonga, Turks and Caicos Islands, Tuvalu, Ukraine, Vanuatu, Venezuela, Vietnam, U.S. Virgin Islands, Western Sahara</td></tr><tr><td><strong>T4</strong></td><td>Algeria, Angola, Armenia, Barbados, Belarus, Belize, Benin, Cameroon, Cayman Islands, Chad, Congo, El Salvador, Equatorial Guinea, Grenada, Guatemala, Guinea, Haiti, Honduras, Israel, Jamaica, Kosovo, Laos, Liberia, Malaysia, Mauritania, Mongolia, Montserrat, Nepal, Peru, Qatar, Rwanda, Samoa, Seychelles, Somalia, South Sudan, Saint Vincent and the Grenadines, Trinidad and Tobago, British Virgin Islands, Yemen, Zimbabwe</td></tr><tr><td><strong>T5</strong></td><td>Afghanistan, Azerbaijan, Bangladesh, Bosnia and Herzegovina, Ecuador, Egypt, Ethiopia, Gabon, Ghana, Guyana, Jordan, Kazakhstan, Kuwait, Kyrgyzstan, Lebanon, Libya, Malawi, Maldives, Mali, Myanmar, Niger, Nigeria, Palestine, Sierra Leone, Sri Lanka, Suriname, Turkmenistan, Uganda, Zambia</td></tr><tr><td><strong>T6</strong></td><td>Bhutan, Burundi, Cambodia, Central African Republic, Comoros, Guinea-Bissau, Indonesia, Iraq, Ivory Coast, Lesotho, Mozambique, Pakistan, Senegal, Serbia, Sudan, Tajikistan, Tanzania, Togo, Tunisia, Uzbekistan</td></tr><tr><td><strong>T7</strong></td><td>Madagascar</td></tr><tr><td><strong>T8</strong></td><td>Papua New Guinea, Russia</td></tr></tbody></table>

### Related checks

Combine SMS Verification with other fraud and identity signals:

* [Mobile Intelligence](https://docs.complycube.com/documentation/product-guides/digital-fraud-intelligence/mobile-intelligence-check) for risk scoring and reputation signals on the same phone number.
* [Email Intelligence](https://docs.complycube.com/documentation/product-guides/digital-fraud-intelligence/email-intelligence-check) for email reputation and disposable/breached email detection.
* [Device Intelligence](https://docs.complycube.com/documentation/product-guides/digital-fraud-intelligence/device-intelligence-check) for device fingerprinting, tamper signals, and network indicators (VPN/proxy, emulator, root/jailbreak).

### Related topics

Use these to integrate SMS OTP verification into a broader KYC flow:

* [Workflows](https://docs.complycube.com/documentation/product-guides/compliance-studio/workflows) to orchestrate SMS Verification and follow-up checks.
* [Smart Forms](https://docs.complycube.com/documentation/product-guides/compliance-studio/smart-forms) to capture customizable customer details in the same journey.
* [Advanced Case Management](https://docs.complycube.com/documentation/product-guides/due-diligence-tools/advanced-case-management) to review exceptions and keep audit-ready evidence.