I have network issue with M31. Particularly for 2nd sim.I tested with two mobiles. The same sim card is working perfectly in another mobile.Is there any chance of resolving this.This mobile model is lacking many features. If this network issue is als...

Why M31 not having features like samsung pay, Knox, secure folder.How can samsung ensure security of the device.Just a camera and long lasting battery is sufficient.Every mobile manufacturing company will do it. What so special in purchasing this dev...