Hi Amy,
Cvent does not have a built-in feature to validate whether a number is a true mobile number or to send an automatic validation message. However, you can integrate third-party services like Twilio or Truecaller to verify phone numbers by sending an OTP (One-Time Password) or checking if the number belongs to a mobile carrier. If you're looking for a manual approach, you can export the registration data and use a phone validation service to filter out landlines and invalid numbers.
Let me know if this helps or if you have any other questions!
Please contact me if you need any assistance on anything with your event in Cvent.
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Amarnath Annamalai
Freelance Cvent Specialist
www.cvntexpert.cominfo@cvntexpert.com------------------------------