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That is when the first telephone has came out. It was firstly called the "Sound Telegraph" . Telegraphs are an efficient way to send information quickly, but they lack personal touch. -
The good part about this telephone is that you can call the people you want too but you have to crank it every time you need to call and this was the second telephone invented. -
Another advantage of POTS is that the carrier (provider) provides the power so that if the end user (the customer) loses power, due to a storm or other reason, the phone system is available as long as the lines are connected. This is because POTS phone companies are required to have generators in their Central Offices. And The disadvantages are that it has to stay at home on a desk. -
Now the second mobile phone has came out. The Nokia is the way better than the telephones in the past they can actually be brought around places but they aren't water resistance. -
The Angler is one of the first smartphone that has been invented. the bad part about this phone is that it is very old and it doesn't have that much battery like how the newer ones do now. -
Pros: Inexpensive (but tied to a contract in many countries).
Cons: Battery life may be insufficient for heavy users.