Hello Adarsh,

The best branch of engineering which deals with laptops and mobiles is Computer Science or Computer Engineering and Electronics and Telecommunication Engineering. In computer engineering, you have various programs to learn like Android, computer languages, computer hardware and so on. Whereas in ECE, you can learn about mobile networking, transmissions.

CSE is the best branch if you want to learn about mobile as well as laptops. Companies like Microsoft and Google prefer CSE students over ECE for recruitments as CSE students tend to have a strong base working with laptops and PCs.