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Old 19th Jul 2020, 7:20 pm   #19
qazxsw123
Triode
 
Join Date: Nov 2016
Location: Frinton on Sea, Essex, UK.
Posts: 45
Default Re: Phonecard payphones

Before mobile phones they were used in prisons,no cash and controlled distribution. it was known for the cards to be scored and cut through the hologram and then glued back together with a 180 flip so 1/2 the hologram was on each side, the reader just looked for a reflection from the hologram to authenticate. the heat stamp destroyed the hologram.
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