I've only had the Galaxy Active 2 for 4 days (previously had the Galaxy for years that worked great). Since switching over I no longer get the complete sleep details (efficiency, light, deep, rem, etc...). All I get is total sleep time and even that seems incorrect now, as it said I woke up this morning at 4:30am and this was not the case. I switched over to continuous heart rate monitor and did a reboot as some have suggested to see if that helps but won't know until tomorrow. Was just wondering if anyone knew of a definite fix to get this to work, the sleep monitor is quite an important feature to me. Suggestions greatly appreciated!