I am planning to buy a Nexus 4 from US and want to use it in India. Should I expect any issues with this? Is that phone compatible with all carriers in India? Are there any power related problems?
There was an India-specific version released with a different Android build, including a different Radio. (Build JDQ39E).
I don't believe there are any hardware differences, and I have personally never been to India. If it doesn't work when you get it home, you may need to flash the Indian version's radio image with Fastboot.