Text messages received overnight on Wednesday confused thousands of mobile phone users in the US.
The messages were sent on Valentine’s Day, but bizarrely arrived eight months later, carrying Wednesday’s time stamp.
The issue occurred across all major carriers in the US and affected both Apple and Android devices.
Syniverse, which provides services for major telecommunications companies, placed the blame for the error on an “internal maintenance cycle”.
In a statement on its website, Syniverse apologised to the 168,149 customers who were affected by the mishap, assuring them that the issue has since been resolved.
“While the issue has been resolved, we are in the process of reviewing our internal procedures to ensure this does not happen again, and actively working with our customers’ teams to answer any questions they have,” said William Hurley, a company spokesman.