Why is the LG cheating its customers?. Now I regret a lot buying LG G3. My Samsung N7100 was far more better than this phone.
You know, if you took the time to properly write up a coherent diatribe detailing exactly what you need or what you think you have been wronged, it would go a long way getting some feedback. Simply starting a thread and not saying much of anything doesn't help. LG has cheated you in what way exactly?
Video calling requires some sort of video calling service on both ends, and in most cases a video calling app on both ends. You don't say what efforts you've tried (and or failed at). You don't even explain or detail what a Samsung N7100 has to do with the whole equation other than to simply state, "My Samsung N7100 was far more better than this phone". Better in what way? Better at making video calls, making iced lattes, grilling chicken, making custard flans?
So you don't want to use "Skype or similar apps", then what else do you want to video call with? What service provider are you on? What part of the world? Do they use/provide a proprietary video calling service/feature on their network? Which version G3 do you have?
For us to help you, we need more relevant info...