Hi @Kmoleguru,  Could you please provide some additional context?However, please note that this is the Sandbox URL: https://sandbox.us.webexconnect.io/.Have you logged in using this URL and tried sending an SMS? Thanks,Nagarjun

Hi @Dmytro Benda, The issue has been resolved. Please try adding the Ukraine number now and let us know if you encounter any further issues.Thanks,Nagarjun

Hi @Dmytro Benda,  Our tech support team has identified the issue and is actively working on a fix. We will update you as soon as the issue is resolved.Thanks,Nagarjun

Hi @Dmytro Benda, Apologies for the delay in my response. Could you please share the last four digits and the country code of the Ukrainian number you tried to add? Our technical team requires this information to investigate further.