You may see the error "This cell number is invalid!" while entering your phone number during registration. This usually comes down to one of two things:
- The number is already in use — each Attensi account needs a unique phone number, so if it's tied to another account already, it won't validate.
- The number was entered incorrectly — most often because a digit is missing or special characters were added. Double-check you've entered the full number, including area code.
Do not add special characters such as parantheses “()”, hyphens “-”, or addition symbols “+”. Only enter the numerical digits of your phone number.
If neither of these applies to you, contact support for help.