Development on the Samsung S6

Sorry if I go a little bit off topic, but I have another questiong regarding the S6 and all these new devices (Mali 7xx, Adreno 4xx, 5xx), in theory OpenGL ES 3.1+AEP is supported on these devices. How is UE4 OGL3.1 toolchain working with those devices? Are there driver compatibility issues? Anyone tested this?

Thank you,
Martin