I applied through college or university. The process took 1+ week. I interviewed at Ericsson (Noida) in Aug 2010
Interview
Written - Aptitude and English. English of quite high level but repeatition of previous papers.
Aptitude - simple to medium difficulty level. It was followed by an easy going cellular technology basics based technical interview and then an HR interview. (I took it just after graduation). Ironically, no one in the company, except the core HR and of course those from good educational background, would communicate in even a simple fluent English.
Interview questions [1]
Question 1
none of it was difficult as such. The media(air/electrical/optical) from a phone to an RNC was the toughest they asked. Some questions on transmission protocols were there, but that wasn part of the Graduate course so they went easy with it.