Apple has placed restrictions on bulk purchases of its iPhones in some Asian territories after the coronavirus outbreak caused interruptions to supply.

Customers in Mainland China, Hong Kong, Taiwan, and Singapore are limited to buying two devices of the same model per order. While similar limitations are in place in many other regions, customers in those territories are not being notified of the limitations until check-out.

The firm issued a warning to investors last month that the coronavirus outbreak had significantly affected its supply chain, stating that it may not meet its quarterly revenue expectations. Apple shut down all of its retail stores outside China 10 days ago, including 52 outlets in Mainland China, Hong Kong and Taiwan.

Apple suffered a 61-per-cent year-on-year drop in iPhone sales last month, at a time when Chinese factories were largely closed. Many have since reopened as demand for iPhones drops globally with the spread of social distancing and closed retail outlets.