Unfortunately, it's not the Android 7.0 that's the problem, it's that the J3 Eclipse only has 1.5GB of RAM. SG Mobile requires more than 1.5GB to run. There's a thread on it here: http://forum.skullgirlsmobile.com/threads/official-android-device-compatibility.113/Samsung j3 eclipse
Os: android 7
Says my device is not compatible. But it is an android 7.0.