COROANA!!!!! choose the correct words. Mobile phones USE/ARE USED by over 2 billion people all over the world today. But who WERE THEY INVENTED/DID THEY INVENT by? Mobile phone technology WAS FIRST DEVELOPED/ DEVELOPED FIRST by American telecommunications company at&t, but the inventor of the first hand held mobile phone CONSIDERED/ IS CONSIDERED to be Martin Cooper of Motorola. He MADE/ WAS MADE the first mobile phone call on 3 april 1973. Since then mobile phones HAVE BECOME/ HAVE BEEN BECOME cheaper and much more accessible to the general public. In the United States mobile phones OWNED/ ARE OWNED by 50% of children and nearly 3 billion dollars per year SPENDS/ IS SPENT on commercial