Check/Insert SIM
I've seen many phones that say check/insert SIM. They dont work in other phones, in a card reader, or on a plate with green eggs and ham. Does anyone have a reason for why this happens? Do they just go bad?
Example man walks into store says my phone said this (check sim) this morning. I power cycled the phone, nothing. Put the sim in a card reader, card reader rejected it saying that it cannot read that type of card. I had to replace the sim. Why would it just 'go bad'?
Thanks in advance.
Example man walks into store says my phone said this (check sim) this morning. I power cycled the phone, nothing. Put the sim in a card reader, card reader rejected it saying that it cannot read that type of card. I had to replace the sim. Why would it just 'go bad'?
Thanks in advance.
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mass produced electronics... ota overload... user error... bad/low quality charger... moisture... number of reasons.
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My guess is mass produced electronics. What would the charger have to do with it?
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Buy a charger from Wal-Mart, poor quality, unregulated wattage, more power distributed through out the phone than it can handle...
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Also, network services... bad handoff, stuck on 2 towers trying to connect to a thrid, all laws of probablity kick in, work arounds fail, sim trying to register and use more of the network than it can take... these are rare becuase they have safe gaurds in place, but radio cannot be controlled at every level.
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🤣 Also Electromagnetic pulsars, Dismongronification, government spying... Just kidding!
Actually, great list of stuff. Most I've seen have been from moisture, charging, & (believe it or not) user error! I had one person who absentmindedly scratched the gold stuff on the sim card, who'd uh thunk that'd a hurt it??? 😛
Actually, great list of stuff. Most I've seen have been from moisture, charging, & (believe it or not) user error! I had one person who absentmindedly scratched the gold stuff on the sim card, who'd uh thunk that'd a hurt it??? 😛
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lol funny posts...
most of the check sim signals were caused by the network integration. Basically they couldn't handle the information being pumped into them so they shut down. Corp stores have known about this almost since the beginning of the problem, which has tappered off signifigantly lately. It was claimed to be a bad batch, but so widespread (nationwide as I understand it) would have been very improbable unless they consider a batch to reach back 2 or even 3 years....
So the conclusion was reached that it was the network integration (which was completed in my area around the same time the check sim phones stopped coming in to get fixed lol)
most of the check sim signals were caused by the network integration. Basically they couldn't handle the information being pumped into them so they shut down. Corp stores have known about this almost since the beginning of the problem, which has tappered off signifigantly lately. It was claimed to be a bad batch, but so widespread (nationwide as I understand it) would have been very improbable unless they consider a batch to reach back 2 or even 3 years....
So the conclusion was reached that it was the network integration (which was completed in my area around the same time the check sim phones stopped coming in to get fixed lol)
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While those reasons could possibly explain some of these issues, the more likely reason is the one that was addressed by Cingular at the end of October 05.
A very large batch of 64k Gemplus sims would fail randomly for no apparent reason. Over time a "wafer" component in the chip would weaken and cause it to fail. This batch of cards was unregistered with Cingular's network, but if a customer had one active on an account it was not deactivated.
A very large batch of 64k Gemplus sims would fail randomly for no apparent reason. Over time a "wafer" component in the chip would weaken and cause it to fail. This batch of cards was unregistered with Cingular's network, but if a customer had one active on an account it was not deactivated.
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