To remove Breakwall APN and reset your Internet connection to the original APN, follow these steps:
1. Go to Settings -> General and scroll down to Profile:
2. Press the BreakWall profile and then press Remove
3. Go back to the Settings -> General screen and scroll down to Reset
4. Choose Reset Network Settings
Go to Settings -> WLAN. Find the connection and press the “>” button at the end. Scroll down to HTTP Proxy and press “Off”.