https://padlet.com/msanchezh/b5y7nacfgqo5 For my seventh graders en-us 2016-09-06 17:04:01 UTC 2023-03-24 14:34:16 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Dootheets.png msanchezh https://padlet.com/msanchezh/b5y7nacfgqo5/wish/121874467 A mobile phone is a portable telephone that can make and receive calls over a radio frequency carrier while the user is moving within a telephone service area. The radio frequency link establishes a connection to the switching systems of a mobile phone operator, which provides access to the public switched telephone network (PSTN). ]]> 2016-09-06 17:05:02 UTC https://padlet.com/msanchezh/b5y7nacfgqo5/wish/121874467 msanchezh https://padlet.com/msanchezh/b5y7nacfgqo5/wish/122823322 2016-09-09 17:14:59 UTC https://padlet.com/msanchezh/b5y7nacfgqo5/wish/122823322