While trying to register my card, I am getting the error message stating mobile no. mismatch, what could be the reason

While trying to register my card, I am getting the error message stating mobile no. mismatch, what could be the reason

Please enter the mobile no you have updated in our system, In case there is a change in the number, Please contact our Customer Care Center and update the same.

While trying to register my card, I am getting the error message stating mobile no. mismatch, what could be the reason

Please enter the mobile no you have updated in our system, In case there is a change in the number, Please contact our Customer Care Center and update the same.