The Telecommunications Commission in Solomon Islands says it is monitoring an international scam targeting mobile phone users in the area.
The Commission says the hoax involves a text message designed to obtain confidential information, such as bank account details.
A spokesperson for the Commission, Wilson Leguvaka, is also warning that people could face costly international charges if they call the number provided.
"Some of the messages would be that you know, you've got a call from this number, the number would have some prefix of another country code and then followed by a number. They would just generally say 'can you call this number back?' that is very much like the typical message that would appear."
Wilson Leguvaka says people who receive the hoax messages should report them to their mobile network operator.