The first telephones needed cables and electricity., You couldn't move them around., The first phones without cables needed enormous batteries., They were used by the military, police and ambulance men., The first real mobile phone was also very big, with a big battery., Now mobile phones are much smaller. , They still use batteries and you have to charge them, but they can take photos and videos, and you can connect to the internet and watch TV!.
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Rooftops 5 Unit 5 Telephones
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Donnawalsh1
Grado 5
ESL
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Rooftops 5
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