I've got 4.1 on my phone right now but there is something up with my phone. It lags alot.. Took nearly 20 seconds to open the phone app a while ago and going in and out of bitesms and other apps sometimes take just as long. What I want to know is if there is a way that I can restore back to stock 4.1? My blobs are not on the server as this phone is an replacement.