Need more evidence than that before I'll believe it.i went to go work out and just brought my room key card inside my cell phone holder. Get back to my room and the key doesn't work anymore...
can it demagnetize other cards too?
i went to go work out and just brought my room key card inside my cell phone holder. Get back to my room and the key doesn't work anymore...
can it demagnetize other cards too?
It wasn't the cell phone, it was the case. It probably has a magnetic clasp, or an "I'm docked" magnet in the base if it's for a Blackberry or other phone that is set up that way.
I'm an issuing authority for my institution's ID badges, and I have heard this quite a bit, and they always blame the phone. I have them show me the case, and inevitably I can show them the magnet. Haven't had a demagnetized card yet that didn't have a magnet involved.
It's not possible for the low power RF of the cellphone to degauss the magstripe on anything. Even a low-co magstripe is a few hundred Oersted, and most of the hotel keycard types are hi-co these days at around 3000 Oersted.
The problem is a lot of these new rare-earth type magnets that are in cases and that people like to buy and play with are so tiny, but have huge Gauss ratings. I've seen some neodymium magnets the size of a dime that have close to a 10K Gauss rating. Get that near a magstripe on any type of card, and kiss the encoding goodbye.
cell phone demagnetized my hotel room key card
i went to go work out and just brought my room key card inside my cell phone holder. Get back to my room and the key doesn't work anymore...
can it demagnetize other cards too?
1900 MHZ is close to microwave.
Put any card in a microwave for just a second or two and same thing will happen so no surprise putting cards together with phone in holder over long term exposure wipes it out.
Uhhhhhhh, no.1900 MHZ is close to microwave.
Put any card in a microwave for just a second or two and same thing will happen so no surprise putting cards together with phone in holder over long term exposure wipes it out.
It wasn't the cell phone, it was the case. It probably has a magnetic clasp, or an "I'm docked" magnet in the base if it's for a Blackberry or other phone that is set up that way.
I'm an issuing authority for my institution's ID badges, and I have heard this quite a bit, and they always blame the phone. I have them show me the case, and inevitably I can show them the magnet. Haven't had a demagnetized card yet that didn't have a magnet involved.
It's not possible for the low power RF of the cellphone to degauss the magstripe on anything. Even a low-co magstripe is a few hundred Oersted, and most of the hotel keycard types are hi-co these days at around 3000 Oersted.
The problem is a lot of these new rare-earth type magnets that are in cases and that people like to buy and play with are so tiny, but have huge Gauss ratings. I've seen some neodymium magnets the size of a dime that have close to a 10K Gauss rating. Get that near a magstripe on any type of card, and kiss the encoding goodbye.
1900 MHZ is close to microwave.
Put any card in a microwave for just a second or two and same thing will happen so no surprise putting cards together with phone in holder over long term exposure wipes it out.
More likely the hotel screwed up ... happens occasionally to me & the cell is not near the key card.
To put it another way, how do you know the hotel did not screw up?
Carry it in your butt next time.