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# Mobile Device LAN/WAN Connections (4 of 6) ## Cellular Data Connection Continued - GSM and LTE require a SIM card installed in the device - When a carrier uses a SIM card, you can sometimes move the card from one device to another - When a carrier does not use a SIM card, you must contac...

# Mobile Device LAN/WAN Connections (4 of 6) ## Cellular Data Connection Continued - GSM and LTE require a SIM card installed in the device - When a carrier uses a SIM card, you can sometimes move the card from one device to another - When a carrier does not use a SIM card, you must contact the carrier and request permission to switch devices - You might find that you want to disable cellular data or cellular roaming at times - To disable roaming on an Android device: - Go to the Network & Internet menu in Settings, tap Mobile network, then turn off Mobile data or Roaming - On an iOS device: - Open the Settings app, tap Cellular Data, then turn off Cellular Data, tap Cellular Data Options, then turn off roaming