If you've got a Samsung Galaxy S6 edge and are on the Sprint network, you can expect to see an over-the-air upgrade to Android 5.1 over the next few days. The update provides better control over notifications, device protection that persists even after resetting to factory settings and the usual performance improvements and bug fixes.
Sprint has posted a support page showing the release, which states that updates are issued in stages and can take several days to hit all phones.
T-Mobile rolled out Android 5.1.1 to the Galaxy S6 and S6 edge earlier this month.
WordPress.com