Where in Asia can you get the cheapest iPhone X?

Definitely not in the Philippines.

As matter of fact, the Philippines’ online Apple Store has the second most expensive pricing on iPhone X among countries in Southeast Asia and East Asia. The most expensive place to get iPhone X is in South Korea though, which can cost as much as $300 to $400 more than a similar unit being sold in the US. The cheapest places to get iPhone X is in Japan and Hong Kong. Mind you, these prices are before taxes. But if you’re a tourist with a foreign passport in Japan, you can get the iPhone X tax-exempt. Just remember that iPhones sold in Japan are required to have a camera shutter sound every time you take a photo. You can’t disable the sound to take photos surreptitiously.