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# What are the disadvantages of a mobile phone?
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Source: mawdoo3.com
الهاتف الأول (Info)
تمّت صناعة الهاتف العادي الأول في نيو هيفن عام 1878م، وقد كان يتم تأجير الهواتف على شكل أزواج للمشتركين، حيث إنّ على المشترك إعداد خطّه الخاصّ ليتمكّن من التواصل مع المشترك الآخر، وفي العام 1889م اخترع ستروجر محوّلاً يُمكنه ربط الخط الواحد بأي خط من مجموعة خطوط تصل إلى المئة.
