Volume Amplifier isn’t the first jailbreak tweak that promises to make your iPhone louder, but its creator claims it’s different to the others. Rather than just editing a configuration file on your iPhone to make your speaker a little louder, this tweak actually amplifies the audio stream.
After installing the tweak on your iPhone, you will be able to increase your iPhone’s speaker volume way past the limit set by Apple. Once you hit 100%, just keep pressing the volume up button to go further; Volume Amplifier will display colored a colored indicator alongside Apple’s default volume indicator to show you how far you’re going.
Imagine your iPhone’s volume speaker increased to 200%, wouldn’t it be a great thing ?
The tweak won’t alter the volume of your iPhone’s main speaker, so it won’t make your music, movies, or games any louder. That’s a massive shame, because I think that’s what most people would use a tweak like this for. But if you think your iPhone’s call speaker isn’t loud enough, this could be the solution.