Now this is my sister's phone so I don't know much about it. She gave me the phone and it was stuck on a screen that had a red triangle with a red exclamation point in it and a mytouch in the background. After looking online I seen how to get into the hboot screen and hit factory reset. After doing factory reset the phone went back to the fastboot screen, I went into bootloader and in the bootloader screen I hit recovery and it went back to the screen with a red triangle with a red exclamation point and a mytouch in the background. I pressed up volume and hit the power button it took me to a blue menu but it tells me something about illegal operation. I'm thinking that the SD Card is not the original and it can't boot some things up that it needs to from there. I'm stuck I don't know what to do from here.