The pads in the bottom are gold plated to ensure that they don't rust or anything when they're used in a phone. They also provide better contact when they're gold-plated. Many other cables and connectors are also gold-plated. You can get gold recovery from SIM cards. Although because the gold plating is very very thin, it takes a lot of them
A SIM card is basically an electronic chip that is made of silicon in addition to some other metals including phosphorus and gold. If you notice SIM cards you will see an outer layer of gold, which comes into contact with your device.
Do all SIM cards have gold plating ? Yes, everyone I've ever seen does but there's not much but it is reasonably easy to access unlike the majority of gold bearing e-waste. Best processed with ribbon cables memory cards and other gold bearing things heavily contaminated with plastic but I typically put the torch to it until it quit smoking put it in a stainless steel mixing bowl and aluminum bat like an oversized mortise and pestle and then I feed it to the piranha solution which readily devours anything made of carbon and precipitate the gold back out of solution any number of ways
If u look at them closly they are SIM cards (in todays world we use micro sim which is the smallest). Most telecom providers stopped providing these big sims so they anyways go to waste
I'm more interested in what chemical is used to strap of the gold of karts chips wharever that proces I want to learn but no one seems to want sharing the process step by step.....after it's stripped of with unknown substance. ...
@@bantaixpro4534The copper contacts are plated with a very thin layer of 24k gold. There is only a tiny amount of gold contained in each SIM card, but it does add up if you have enough and can process them efficiently.
