There are two options after B.Tech. Those are higher study and job.
Higher studies : Higher studies will make you confident and, of course, help you build in depth knowledge of the subject. It will also give you an advantage during interviews. There are numerous higher studies options available after B.Tech. You can go for M.Tech, MS, MBA, MCA, MMS, PGDM and Short Term Courses. Some of Masters courses courses are M.Tech in Electronics and Communications, M.Tech in Microelectronics and VLSI, M.Tech in Communication Systems, M.Tech in Electronic Design and Technology, M.Tech in Power Electronics, M.Tech in Computational Statistics. Some short term courses are Advanced Diploma in DSP System Design, Advanced Diploma in Real Time Operating Systems, Certificate courses in Verilog and VHDL, Certificate program in VLSI design engineering, Diploma in Embedded Systems Design, Diploma in VLSI Design, Diploma in Wireless Technology, Online course on Embedded Systems, Optical Fiber Communications, Telecom Protocol Development.
Jobs after B.Tech : There are many jobs opportunities after B.Tech ECE. There are many private companies that recruit engineers in B.Tech in Electronics and Communication. Some of them are Reliance, Nokia, Tata, LG, Wipro, Infosys, TCS, Samsung, Pinnacle, Philips, HP etc. Or start your own business.