### Answer Retell AI currently supports verification in 83 countries through Persona [(1) ]() . If your country is not listed, you can contact Retell to request a manual review based on risk and business needs, which may enable verification for your country . Why KYC verification is required: Before you can make outbound calls with Retell, you need to complete KYC (Know Your Customer) verification . This requirement applies regardless of whether you're using Retell-provisioned numbers or importing your own numbers from providers like Twilio [(2) ]() [(1) ]() . For imported Twilio numbers: When you import a phone number from custom telephony via SIP trunking, the number still needs to be associated with a verified Retell account to enable outbound calling functionality [(2) ]() [(3) ]() . Next steps for Czech Republic: Since Czech Republic may not be in the current list of 83 supported countries, contact Retell support at support@retellai.com to request manual verification [(1) ]() [(4) ]() [(5) ]() . Include your account email and workspace ID when reaching out.

​ To learn more, see the sources I considered: [[1] KYC Verification](https://docs.retellai.com/accounts/kyc) [[2] Import Phone Number](https://docs.retellai.com/api-references/import-phone-number) [[3] Custom Telephony Overview](https://docs.retellai.com/deploy/custom-telephony) [[4] Hey i see KYC Verification Failed: Need manual review. Please contact support@retellai.com for assistance. this message](https://community.retellai.com/t/hey-i-see-kyc-verification-failed-need-manual-review-please-contact-support-retellai-com-for-assistance-this-message/329) [[5] Need Manual KYC as i am not able to verify my face after uploading my ID](https://community.retellai.com/t/need-manual-kyc-as-i-am-not-able-to-verify-my-face-after-uploading-my-id/453) ​

Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.