if you have not received the ts eapcet login id on  registered mobile number even after one day you should first check if the mobile number entered was correct if it was correct then you  have  visit the official ts eapcet website and click on the forgot login id or help option where you can enter your details like application number date of birth and registered email id to retrieve your login information if that does not work you should contact the ts eapcet helpline number or send an email to their support team explaining your issue with correct details they will help you get  login id