How to Disable 3G on Nexus 4
This Android tip shows you how to disable 3G on Nexus 4 and use only 2G networks as your mobile data network. It is very useful to save battery, 3G ...
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How to Set Up SIM Card Lock on Galaxy S2
Follow these steps to setup SIM Card Lock on Android devices, like Samsung Galaxy Series and other devices:
1. Open "Setting" App
2. Go to "Security"
3. Tap on "Set up SIM Card Lock"
4. Make sure the "Lock SIM card" is marked. (You need to know your SIM PIN to use this feature. On some SIMs the PIN is 0000 by default)
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