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Its free to use. It has no concerns with any mobile service provider.
What would be your main purpose of understanding this tech? just for knowledge or Some Project/experiment/technical job?
Well, its just for knowledge which i think, is necessary to know about it. I just start cursing myself of not knowing these things and how they work when my friends start talking about these stuff and I am completely blank on this topic (although i have least interest in tech stuffs).
Well can you briefly explain how’s this free?
Also I came across the word “Hotspot” while googling, whats the relation with WiFi?
Thanks for reply!