it is recognized as usb device? cause then you dont need to get it into adfu mode.
if it isnt, the resetting is a bit tricky, i my case i had to try several times.
the updater software then detects it and says its in recovery mode.
oh and the chipset/memory doesnt say much, according to s1mp3.org. you need the board number to know what device you have. my i-nickel has that number under the LCD (remove front panel and lift the lcd to see it). mine says ZX-763A-SL-V2.
nothing to be found for that board tho
i've gotten several replies from uxcell by the way.
it seems (at least for the i-nickel) there is now 2 firmwares online, where it used to be 1. sadly, neither did the trick for me. they advised me to format as well, but i had already tried that to no avail. it keeps showing me a blueish screen.