A very well trusted tech friend of mine recently gave me MIUI on my Samsung Galaxy S Showcase. Today, I noticed that there was an update for MIUI and downloaded it. I rebooted the phone and now it won't go past the "Samsung" screen. I went to recovery manager and tried to reboot it there; I also tried to clear to factory settings and clear my cache. However, it will not go past the "Samsung" screen. I need to use my phone soon. Please help! I am so scared!