My 3gs had a APN:616-0435, recieved an APN:616-0431 which had the 3M self adhesive on the back of the battery. I noticed a needed clarification in the instructions, when prying up cable No:1 pry up oposite of ribbon towards outside of case not as pic shows. White release tab for ribbon, mine was black. Also battery only had 30% charge when I activated phone. No full as web page states.
Overall seems like a good kit.