GIN means Get It Now, & it is an option you can add so if bidders don't want to wait on an auction to end, they can click your GIN option, & pay you the amount you are looking to get for the item listed, & then it would be theirs, no bidding needed... hope that helps, I remember when I was relatively new here... :-) By the way, this option is located near the bottom when setting up your auction, there is the little link you click on which says: Show Advanced Options If you click that it opens up other options such as Auto-Relist, Starting Bid, GIN & Number of Days... :-)
And this does work on straight talk the reason why i ask is cause i won a phone if here b4 and they said it worked on straight talk well come to find out it didnt.. so are u 100% sure it can be used with straight talk