Whatsapp Integrations: not receive sms for confirm

Whatsapp Integrations: not receive sms for confirm

Hello,

I'm trying to configure Whatsapp Business with Zoho CRM, (I already did with zoho Form with any problems).
I follow all the step but I don't receive the call or sms with code for confirmations.

I try several time in the last 2 days with any success.