Error to send sms in e5 subscription sandbox

Amilkar Soto
6
Reputation points
After select a specific instant sandbox and create admin user, I need put a cellphone number for security.
So, when I write my cellphone number and click over 'Send Code' Button, it show error:
Your phone number did not pass security checks.
Your phone cannot receive an SMS code.
Please, if you can help me!. Thank you!