how to use gpp sim to unlock iphone 4s

i have an iphone 4s that is currently gevey unlocked but it is running ios 5 and i wnat to update it to 6, however if i update it to 6 it will be locked once again to sprint....

i bought this from a guy over a year now....

i bought this gpp sim thing but i not sure how to use it.....

http://www.ebay.com/itm/251291426853?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649

i havenet updated by phone to 6 yet cause i know it will lock back

i am using it in Trinidad and Tobago now....

how do i use this thing that i bought???
brian ramdhaniCT Technician Asked:
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lherrouCommented:
Aren't there instructions with it?

I think you'll find that many experts are leery of providing unlock instructions.
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brian ramdhaniCT Technician Author Commented:
yes they have a video and i tried it but somehow i not getting through..... i guess i will email the folks
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