Why should the mobile phone be charged in both directions? What is the reason? Why can't the mobile phone service be opened? Why has the communication field been in a monopoly position? ......

Why can't the mobile phone service be opened? Please let me tell you the principle of your mobile phone function first. It needs to establish powerful signal receivers and transmitters in various places, and each area needs to use the most advanced and expensive optical fiber to ensure speed propagation. No matter from the cost or regional connectivity (that is, it needs to be approved by relevant departments across provinces or cities), ordinary units or enterprises can't afford it, and only the country can achieve hell connectivity. This is why the monopoly in the field of communication comes from.

I hope I can help you solve the problem!