One well-kept secret of the new Samsung Gear S2 smartwatch is one that is bound to make a lot of Android enthusiasts happy: The Gear S2 will work with non-Samsung smartphones.

Consider that again: Samsung is opening its ecosystem a bit.

There's a caveat, of course. You'll need a phone with Android 4.4 or higher — that comprises 57 percent of current devices as of Aug. 3 — and you'll need a phone that has at least 1.5 gigabytes of RAM.