By far, the most common reason users do not receive an SMS verification code is because they mistyped their mobile number during registration. 

If you do not receive a verification code within a minute or so of pressing "Send", it's very likely that the mobile number you entered is incorrect. To correct this, simply begin the registration process from the beginning and make sure you correctly enter your mobile number.

If you are sure you entered your number correctly and you still do not receive a code via SMS, open a support ticket and someone from Frontive Support will contact you soon.