As per the AP EAMCET counseling 2020, they are of  3 rounds.

The number of rounds may increase in the case of vacant seats. Candidates who are qualified in AP EAMCET 2020 are eligible for AP EAMCET counseling.

Hence if aspirants who already allotted a seat in an engineering college aren't satisfied with their seats can go for further rounds and secure a better seat in a better college.

To know more information follow :

https://engineering.careers360.com/articles/ap-eamcet-counselling

Hello,

It is expected that there will be three phases in AP EAMCET counselling. Although there isn't any official notification regarding the second and third phase AP EAMCET counselling. Please visit the AP EAMCET counselling official website from time to time to know the important information and notifications regarding the counselling. The link is given below https://apeamcet.nic.in/