The Australian Competition and Consumer Commission has warned mobile phone users to avoid returning missed calls from overseas numbers, in the hope that consumers will avoid being scammed.

The ACCC’s deputy chair Delia Rickard said the consumer watchdog hotline received 50, 000 reports of similar scams in 2017.

Ms Rickard said scammers make their money by enticing people to call back a premium number similar to those used by psychic hotlines and phone sex lines.