Write a word or short phrases from the article to complete each sentence.
People started ... while doing thing out of the house.
The ... of cameras on early mobile phones wasn't good.
It is important that a mobile phone battery is powerful and ...
With smartphones today, ... are downloaded onto the phone.
To access information, smartphones can use the mobile phone network, or ...
A smartphone knows when it is ... to the left or right.
Many people use ... to pay bills through their phones, computer or tablet.
A(n) ... in a future phone will be able to detect pollution and pollen.