I made an incredibly stupid mistake and didn't notice what the actual model number for my S4 Mini was. I used a guide to root it as if it were a GT-I9195 and now I've completely screwed it up. When it booted I couldn't connect to any type of network and the soft keys didn't work at all. I tried to install what I thought was the original firmware to the phone, but again didn't know I had the wrong model number. How do I restore my phone to its original state? I no longer care if it is rooted or not, I would just like to have a working cell phone again.