.
Nice post.I respect you very much because you contribute to steemit.I will do activities like you.I would like to extend the steemit.
Thanks for reading.
The telephony has passed through different stages. The phones with manual switching. Then Graham bell discovered actual switching and nowadays it has also included satellite phones.
Now, some of our phones can even be used to control the heater in our houses.
Nice post.I respect you very much because you contribute to steemit.I will do activities like you.I would like to extend the steemit.
Thanks for reading.
The telephony has passed through different stages. The phones with manual switching. Then Graham bell discovered actual switching and nowadays it has also included satellite phones.
Now, some of our phones can even be used to control the heater in our houses.