One can easily change the branch from Mechanical to ECE at the university. Students must score well in their first year to be eligible for shifting branches. However, it totally depends upon the number of seats remaining in the Department. It is advised to preferably change the branch in the first/third semester, otherwise, it will be difficult to cope with subjects.

Requirements for Branch Changes

The student may change from Mechanical to ECE in the following ways:

• If round 2 and 3 of counseling isn’t over, students can attend the counseling to seek admission to ECE if there are any seats left. If you are eligible for ECE in the 2nd/3rd round you may change your course.
• However, if counseling is over you will have to study Mechanical Engineering for the first year. In your second year, you may apply for branch conversion. One must secure more than 8.5 CGPA in their first year to be eligible for it.
• Seats are vacated in the second year due to others dropping out, getting a back or branch conversion. You will have to score as high depending on the number of seats available. 

Although, you can consider pursuing Mechanical Engineering as it is a much better option than ECE until and unless you have some specific reason to change the branch.