3G/4G Speed Optimizer is an app to improve the speed of your Internet connection. However, to use the app, it's essential to have a rooted Android device. If your device is not rooted, you won't be able to use it.
Inside the app settings you can choose three different options: the default mode, where downloads and uploads are on par; the quick download mode, which makes the uploads go a little slower; and the quick upload mode, which makes the downloads slow down a bit.
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3G/4G Speed Optimizer is a pretty interesting app for users of a rooted device. That said, it's also very important to remember that the app consumes a lot of battery power.
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