Hello Santhosh,

The best course you cab do after Completion of Diploma in Electronics and Communication Engineering is Engineering course. You have to write entrance exams to get seat in most of the colleges for lateral entry into B.E/ B.Tech 2 nd year. Exams for lateral entry students for Engineering admission are TS ECET, UPESEAT, AP ECET, LPU NEAT, CU LEEE, AIEEE, DTU LEEE, KU LEEE, etc
Courses best for your Diploma in ECE are listed below.

• Bachelor of Technology (B.E/B.Tech)
• Bachelor of Technology (B.E/B.Tech) in Electronics and Communication Engineering
• Bachelor of Technology (B.E/B.Tech) in Electrical and Electronics Engineering
• Bachelor of Science in Electronics
• Bachelor of Technology (B.E/B.Tech) in Applied Electronics and Instrumentation

Hope this information helped you.

Good Luck!!