I've rooted the phone with SuperOneClick, and everything was ok. I deleted the stock sms app (mms.apk) but kept it in the sd card. Now, because i want to send my phone to lg, i want to restore it to its factory condition, so i tried to install mms.apk on the phone but i get the message "the application is not installed". So i made a hard reset of my phone, but the stock app is not in the phone. How can i install the app, so LG won't "find out" that i erased the app and that i rooted the phone, so to not have any problems with the warranty?? thanks!!