I also tried touching pins 4-5, 5-6 and 7-8 as they say on the internet but it didn't work.
Text on board: S905XQ4_V1.0 2017.11.23
Nand flash: ESSENCORE i3t-8GQ8T2h5TARC
Wifi chip: SV6051P TTB1805 1WT98
White sticker text: AK1805AB-3 D1/F8G 2D1805A26QC S905X SX HYH9
extra info: when it was turned on at startup it showed the amlogic 905w logo but it's really s905x.