Seek to understand portable wifi...... Ask for explanation. Mobile phone data can not afford to use, watching TV, someone with a similar charging bank said that the portable wifi, that?

It is the network card, with the mobile phone card Internet is the same, you say the kind of charging treasure, put the mobile phone card or network card into it, it can emit a wifi hotspot, for others to connect to the Internet, in fact, it is a no screen, no phone call and send information function, it is only configured with wifi function, Then like the network hot spot sharing in the mobile phone, selling is this function, it is better to buy a smart phone directly, install the card, open the hot spot sharing, it is OK