Sales of the iPhone 11 in Vietnam skyrocketed last week while that of mid-range Android devices fell by 10-30 percent.

The iPhone 11, both used and new, remains highly popular in Vietnam three years after its release thanks to its features and affordable price.

Orders for iPhone 11 models soar to twice that of iPhone X last year, with more customers preferring authorized resellers for post-sale services.

Listings of older iPhone models have increased in Vietnam after Apple released its latest iPhone 11 last month, with buyers expecting lower prices.

Thousands of Vietnamese citizens have preordered the latest Apple iPhone models before they are officially released in the country.

Around 500 people, most of them Vietnamese, queued up for 30 hours in Singapore to buy the iPhone 11 on its release on Friday.