Apple has recently expanded the availability of the Apple Watch Series 3 with LTE to four new countries. This includes Sweden, India, Denmark, and Taiwan. However it does not mean that all carriers will support it as it will vary from country to country, so you will need to check with your carrier to see if Apple Watch LTE support is available.
With the addition of the four new countries, this means that the Apple Watch Series 3 with LTE is now available in 16 countries such as Australia, Canada, China, Denmark, France, Germany, India, Japan, Puerto Rico, Switzerland, Singapore, Hong Kong, Sweden, the UK, United States, and Taiwan.
So far Apple’s smartwatch has been selling pretty well according to analysts, with the most recent figure pegging the number of Apple Watches sold to date to be at 46 million. Some are also claiming that the Series 3 is the most popular model to date, mostly thanks to its cellular connectivity.