The Qlabs meter looks interesting.
Roche may be more universally available, and is probably more of an international standard.
I use the CoaguChek XS and XS Pro. I have an extra XS, but I'm not sure about shipping it to India.
Until this week, I've been buying my XS strips on eBay. If you have an XS, you may be able to buy strips outside of India (and maybe even INSIDE India) for an XS meter.
As Pellicle noted, the XS isn't designed to be calibrated. Roche may offer some kind of calibration tool for these meters, but it's unnecessary.
As far as either meter giving results within 5% of lab results, be aware that results may very just as much between labs as it does between meters and lab results . Testing INR - either in a lab or a meter is more an art than a science -- there's really no such thing as an exact value (although some hospitals seem to think so, giving results to the 100th (2.88) rather than a less specific number (2.9).
WHO says that a value within 20% accurate is fine -- if your lab and meter values are within 20% of each other, you're doing okay.