Thank you so much.
As for 4.3 update, in that case I think I should just wait for the 4.3.
Newbie question: When I update to 4.1.2 do I have to restore all my apps/purchases, and will AT&T bloatware remain on my phone?
If the current software on your device is version P87010c or P87010f, using the LGST update is recommended. If the software on your device is version P87010i, using the FOTA (Over the air) update is recommended.
My version is 10i, so I can use OTA to update, but when I check on the phone, it says "Cancelled, Authentication Failed"