In the past a few days, some users have reported problems with slow or failed GPS connection. The COROS team has found the root cause of the problem.
Cause of the problem:
Your COROS watch relies on up-to-date satellite data for faster and reliable GPS connection. The GPS satellite data downloaded on the leap day, Feb 29th 2020, was mistakenly labeled as Feb 29th 2021. As a result, when the GPS satellite data expired after 7 days on March 7th, the subsequent GPS satellite data was considered outdated and was not able to help with GPS connection.
Our engineers have been working hard and released a firmware update on March 10th to fix the problem. Please apply the new firmware update and tap on "GPS Satellite Data" on the Device page to update the GPS data to your watch.
Our sincere apologies for the inconvenience caused for users around the world and appreciate everyone in helping us find the problem and continuing to trust our products.
Intelligent Stride Algorithm
Some users noticed that the pace and distance data of their usual runs remain accurate even though the GPS connection was weak or missing. The reason why COROS watches are able to provide a fairly accurate pace and distance tracking without GPS connection is because of our unique machine-learning intelligent stride algorithm.
Every outdoor run with GPS connection and indoor run with post-workout calibration help build your very own stride model that will be used for indoor running or areas of weak GPS signal (such as tunnels).