2. 4G Radio:

4G technology is a great invention, but you also have to be aware that it requires larger hardware and much more battery than Edge or 3G network. In addition, the way 4G radios work is similar to the Wi-Fi radio. It will non-stop scan for available networks whenever not connected. Well, so if you do not need 4G, turn it off to save more energy as well as protect your battery life.

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