Update Desire HTC 500?



I just bought HTC desire 500 and my android version is 4.1.2 and what is the latest version of android i can download for it? and yes i did the check software update thingy and it says i am up to date but my phone just came out like half a year ago i think but its android version is using dated 9 October 2012?? Getting soo confused here...Also according to Google I should be able to update it to 4.2