True, The first mobile phone call happened in spring., People saw a man talking to himself in the street., Martin Cooper was talking to a man from a rival company., The first mobile phone weighed more than one kilogram., Modern smartphones usually weigh between 100 and 200 grams., False, Martin Cooper worked for a company called Nokia., Joel Engel was walking in the street when his phone rang., The battery of the first mobile phone lasted two hours., The first mobile phone could send messages and take photos., Today, you cannot change the ringtone on your phone.

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