As was mentioned, I don't believe the 20y TOT exists. You will need to start with 20c and manually update:hello bro i need help with y lg g2 d80020c i want to get the tot file of d80020y is there anyone who can help me with this i want the tot file so that i can use it waiting for a positive rersponce asap.............
http://forum.xda-developers.com/att-g2/general/links-manually-forcing-ota-20c-to-20u-t2828874