warranty valid globaly

Nope. If you are very very lucky, you might be able to get a battery or screen replaced, but that's it. Historically, Service providers in India won't touch an iPhone not sold in India, even for paid service.

Service providers in India will not have replacements for US market devices.

It's at the discretion of the people at the service center. They likely won't have international iPhone models on hand for replacements, and therefore aren't obligated to honor warranties or AppleCare plans from outside their own country(except when both are in the European Economic Area or Switzerland).

(245581)

No, the warranty for a phone purchased in the U.S. is only valid in the U.S.