I am using a Virgin Mobile Samsung Galaxy S3 SPH- L710. I am not sure exactly what type of information that any of you would need in order to help me but I will just say everything I did. I rooted my phone using some safe way that was pretty easy and it worked and everything but it would not work for a certain root app I wanted to download. So I then reverted the root and tried to root using some siyah kernal so that I could use a certain app. Long story short I ended up changing the firmware(if thats even the right term) from Virgin Mobile 4.3 to Sprint 4.1 which is now not letting me use any data. I am unable to text, browse the web, or use anything that involves using any time of signal. I don't know how to fix it now I have tried some things but nothing fixes it. I don't know what further information that would be required in order to get help with this so PLEASE feel free to ask me and I will promptly respond in order to fix this problem
TLDR: Switched from Virgin Mobile firmware to Sprint by accident now I have no data connection. My goal was to root my phone and use the siyah kernal on Virgin Mobile firmware.