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I want to turn off 3g so I don't constantly use my internet as I am on contract and have only 1GB of internet usage in the plan. Help?
I think turning on Airplane Mode will remove your 3G access temporarily.
Settings > Airplane Mode
You should still be able to use WiFi.
Settings > General > Network > Cellular Data > Off will stop you from using cellular data but still allow the device to work for calls, sms, and mms.
Placing the device in Airplane mode or turning off 3G would not be of any benefit. Airplane mode removes all the phone functions until you take it out of airplane mode. Turning off 3G does not stop the device from using data, just slows the rate at which it can use data.
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