Do you even know when do you get a GST refund?
You need some better data to understand this all, let me help you with that.
Sales
iPhone sales in China Q3 2017 - 11 Mn
iPhone sales in India Q3 2017 - 900K
Difference: 13.75x i.e iPhone was sold 13.75 times more in China the same quarter than India.
Economy
Now let's look at both countries' financial aspects:
GDP per capita China - $8123
GDP per capita India - $1709
Difference 4.75x i.e. China's GDP per capita at that time was 4.75x more than that of India's
So, if an average Indian is 4.75 times poorer than an average Chinese, why iPhone sales are 13.75 times high in China?
With those figures, either India's sales should be 2.7 Mn (900K * 3) devices sold or Chinese sales should be 3.66 Mn (11Mn/3).
Possible factors:
iPhone X 64GB variant retailed in China at: $1266
iPhone X 64GB variant retailed in India at: $1368
Source:
https://qz.com/1106603/where-the-iphone-x-is-cheapest-and-most-expensive-in-dollars-pounds-and-yuan/
Ecosystem offered by Apple in China and India:
Apple Pay (Source:
https://www.apple.com/ios/feature-availability/#siri-restaurant-information)
China: Yes
India: No
Apple Maps w/ Navigation (Source:
https://www.apple.com/ios/feature-availability/#maps-turn-by-turn-navigation)
China: Yes
India: No
Apple Maps (Nearby suggestion)
China: Yes
India: No
Siri Support
China: Supports Local languages
India: Doesn't even understand English properly
One of the most important term or reason, per my understanding, is consumer behaviour.
Indian consumers likes to own a product by purchasing it at full price. Possible indicator of that behaviour:
Public Debt of China: ¥25,549 ($3745 USD)
(Source:
https://www.nationaldebtclocks.org/debtclock/china)
Public Debt of India: ₹52,869 ($767 USD)
(Source:
https://www.nationaldebtclocks.org/debtclock/india)
An average Chinese citizen has 4.88 times more debt than an average Indian citizen.
I quoted my local Apple Reseller's (Inspire) cost. Each state has different GST rates, so learn before you claim something and have no idea about it.