I have an unlocked LG Optimus 540 with no simm card installed, and tried to follow LG's instructions for upgrading to Android 21. Specifically, when I run the LG Mobile Support Tool to start the upgrade process the start button is not active and I get a message saying that my phone is not plugged in. Yet I had installed the USB drivers recommended as well. Any recommendations?
I'm running Win XP.
Also, I do not possess an original LG CD and am not sure where to find the latest version of Mobile Sync software. Would someone direct me to it?
I'm running Win XP.
Also, I do not possess an original LG CD and am not sure where to find the latest version of Mobile Sync software. Would someone direct me to it?

Do you know where to get Mobile Sync for UK?