flamingos-cant (hopepunk arc)Necessity is the mother of invention
kibblebitsCan I use my Apple Card?
ArtworkWhat does this even mean?
Would be easy enough to print a custom case for this
Ah, now I see it. Thanks!
Darkassassin07You could put the rubber bands in between the phone and the case, so it’s not on top of the screen.
HazelDelete Plasma Mobile, get SXMO, disable touchscreen then accept calls with side buttons, ez
terraquadYou seem to have been sniffing some to be smacking your head’s head.
I feel like it was joke directed at people using ATM machines and staring at LCD displays
Take that Android! This works even with the phone off! It works even without the phone at all!
Wait…
ExtremeDullardI’ll do one better:
My payment card was just a bit too wide to fit in my cellphone’s cover. The phone’s own NFC antenna is at the top - and I use it all the time - so the card had to be at the bottom of the cover to avoid triggering the phone all the time, in portrait orientation so-to-speak.
So I dissolved the card in acetone to extract the NFC chip and its antenna, then carefully reshaped one end of the antenna so it’s a bit less wide (and since I couldn’t modify the length of the wire or the number of turns in any way to avoid de-tuning the antenna too much, I sort of accordioned one side of the rectangle to accommodate the extra wire).
Then I set the new shape of the antenna permanently by carefully applying a piece of packing tape over it, flipped it over, taped over the other side to seal everything, then carefully cut around the new, ultra-thin, stubbier contactless payment “card”.
Now it fits really smartly in my cellphone cover!
Next time someone calls me a maniac, I’ll show them this.
Definitely doesn’t live up to their username.
The fact it’s secured with a piece of sellotape is just *chef’s kiss*.
I dissolved the card in acetone to extract the NFC chip and its antenna,
Wouldn’t the acetone also dissolve the insulation around the antenna wire? So when it touches itself, it shorts itself out, and – electrically speaking – you only have one turn of thicker wire?
Only one way to find out, good thing that these don’t cost any money and you can just ask for a new one.
Maybe take some cash out first to cover any payments you may need to make it it breaks in some way.
If OP is using it and is happy with it, maybe one turn of wire is enough for it to still work, maybe with reduced range?
My guess is it wouldn’t work. On a magnetic antenna, the number of turns don’t affect range, but they do affect the frequency to which the antenna is tuned. It needs to be tuned roughly to the frequency the protocol operates on, otherwise it won’t work.
In addition to that, these antennas also need to pick up power, which is also relative to the number of turns.
Wire that thin is usually insulated with an enamel coating. I’d guess it’s either unaffected by acetone, or just tougher to breakdown. Allow the card to dissolve, but remove and dry asap, don’t let it linger longer than necessary.
Veritasium demoed this a few weeks ago while discussing tap-to-pay security and a vulnerability with apple pay+visa.
The Secret Spy Tech Inside Every Credit Card
Well if it dissolved any insulation, it will not work, as the coil isnt even coiling. It is not a one big coil two ends shorted(or as in the picture, a very small coil. Since this works i can only conclude coating does not dissolve in acetone
I love this.
You are fucking crazy. I love you.
pankuleczkaplAmazing, I have never thought of that! I have always carried my card behind the phone, which is a bit too thick for my liking, but this is such a great idea, thanks for sharing!
gedfromgontYou just had to 1-up everyone here…
Well, what if you need an actual card for identification in the bank or something similar? Do you just show them the dissolved one?
The only time I’ve gone to my bank in the last 20 years was to get a new card, or to open a new account at a new bank.
Ricky RigatoniDon’t know about OP but gov ID works for that purpose. I’m more worried about when they go to a store that doesn’t accept tap.
I was thinking about this, and there are two easy workarounds, I think:
But, in either case, I do think you might run into a different issue: automated fraud detection sometimes requires me to chip+PIN, even for transcribed below the tap limit. This has happened to me when traveling. I don’t think there would be any way around that, and if you then fail to authenticate with chip+PIN, it’s reasonable to think that the bank would lock your card for contactless payments until you successfully authenticate the card again with chip+PIN. (To be clear: this is only speculation; not sure if that would be an issue in practice.)
So, I suspect that whether this would work or not might depend on your institution (or maybe jurisdiction?)
SeductiveTortoiseYou clever, I like.
Kudos for the effort. With that said, this would definitely raise some eyebrows if you have to return the card when getting a new one.
I’ve never had to do that… Just say you lost it.
The bank just mails the new card to me. I still have old debit cards.
Knowing the reliability of our postal services, I would very much prefer to receive it in person. Of course there are security measures (activating it only when you get it and so on), but still.
hoshikarakitaridiaPeak Lemmy behaviour I love it
Have you ever run into difficulty with needing to authenticate with chip+PIN? Like while traveling?
That would be my big with with this; it would make it very difficult to pass a PIN check, to say the least!
Super cool idea. I might just try it myself and see if I run into issues.
What I modified was in fact a contactless payment token. It had the form factor of a payment card, but it only does NFC.
I have another card for chip+pin.But I almost never use it where I live, because all limits were lifted on contactless payments a few years ago. If I try to pay something really expensive contactless, it will ask me for the pin - which is specific to the payment token.
Do you mind if I ask what bank issued those? Why? Does the chip+pin also tap or are they features on totally separate cards?
I’ve never heard of a separate tap to pay token (outside of perhaps transit passes or like, arcade cards), and never a card based tap transaction that asks for a pin.
Payment tokens are very common. Usually they’re sold as keychains, wristbands or rings, and they’re provisioned to work with the myriad of payment processors out there - which aren’t banks.
in my case, it’s a token from iCard. The way it works is, it’s connected to a regular bank account number with an IBAN number, and you transfer money to it that you can then spend with the contactless token. The nice thing is, if you lose it, you can’t lose anymore money than you put on it.
PerogiBoiIronic it’s a monobank card, it’s mobile only and you have to use a locked unrooted googled phone (or an iPhone) because big brother said so.