Is the T-Mobile version of the iPhone X unlocked?

The phone will be locked to the carrier unless they unlock it. To unlock it, you'll have to follow a set of their rules and get them to unlock it, if they even will. Your best bet to get an unlocked phone is to get one from Apple that is unlocked.

Why are we even answering these questions? A simple search would reveal, should the OP buy it, a multitude of issues if this is done. But if the OP wants an unlocked X, his best bet is to go to Apple.

Sorry for the tone, but yes. I live in Canada. Everyone that bought an iPhone X got it completely unlocked. Carrier branding is illegal here. Whether by provider or at an Apple Store or Corporate (Apple's Canadian Offices are in Toronto, Ontario, and yes, you can get Apple products from there). My suggestion is to get it in the country or region that you live in. That's the only way it'll be unlocked and get it directly from Apple.

People have bought iPhones from the States, only to bring it back to where they live, and have a multitude of issues.

There are no unlocked iPhone X's for sale in the USA. This is normal at launch and if you purchase them they are all linked to a carrier.

It will probably take at least 6 months for unlocked iPhone X's to become available.

Also, remember that iPhone warranty is not international, so if you have a problem with your phone, you will get no help in India - you will have to get on a plane to the US.

It is just not worth doing. Wait.

And this is why we're telling the OP not to do it. Whether he chooses to listen to all of us or act on "impulse" is and will be beyond our control. I know everyone in Canada, that got the X when it was launched, got it completely unlocked and carrier free, even from the carriers, because it's illegal to have carrier branding on the phone. Still, this stunt shouldn't be done either. It would be the same if the OP came to Canada, got one and flew back to India and had problems with it.

And yes, despite the crap that you read here in the forums, OP, the iPhone warranty is definitely not international. It is definitely limited to the country of purchase. So don't believe that if people tell you.

It is definitely not worth purchasing a phone in the US or Canada, only to not have it work when you get to India. Just wait. Even if you have to wait 6 months, then wait 6 months.

Yes and it is the same here in the UK - I could purchase an iPhone X directly from Apple unlocked. You can still get the deals from Vodafone, 02, EE and the like, but they are at reduced cost and all carrier locked.

Yeah and probably paying out the rear end because it's subsidized. That's what "reduced cost" means. People don't realize this one thing. You pay money up front, and the rest is subsidized over x amount of months (here in Canada it's 24), until the phone is paid off. Then the cycle starts again. That's how they get people. All my phones have been unlocked from the start. Very expensive, but I don't have to deal with my phone being subsidized. And I get them from the manufacturer. Not the carriers.