Answers

2014-11-10T11:50:12+05:30
BEFORE MOBILE PHONES: People used to send information with the help of pegions ans

AFTER MOBILES : People can talk directly. Information can be sent within a few minutes ir seconds. There is gurantee for the Information to be delivered.people can talk directly. People can send messages also. There are some expensive mobiles in which more than 2 persons can talk with the help of conference option. Radiation increased more.
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