Keep updated with pre installed apps of your optimus one

      Your optimus one will be coming with some pre installed apps on it like facebook,  twitter, YouTube etc. Since it is added before setting up your market account (before signing in with your google account during the first use), details of those pre installed apps might be unavailable in the market's "my apps" option
and thus you won't be getting update notification.  But this can be solved, once after updating manually. To update manually, search the name of the app on the market (eg : Facebook for android) and then on the search results you can find the update option. After the first manual update, you will be getting the update notification there after.