Have you tried using your work reader some more?
I havenāt been back to the office so havenāt gotten a chance to try that reader again, but I today I got a Wave ID pcProx reader and while it scans the original card and my T5577 rings from inches away, it does not react to the NExT at any distance or angle.
When programmed to EM410x, even a $5 keyboard wedge from Aliexpress picks up my NExT from a 1/2 inch away, so it seems pretty clear to me that something about HID doesnāt work well with my implant. Sure, I may have cloned it wrong somehow, but I did it the same way to rings and they work, so maybe thereās a trick to cloning HID to the NExT I donāt know about. So far the only thing I currently have access to that will read the NExT in HID mode is the Proxmark when the antenna is directly over the end of the chip and touching my skin, and lf search reports the same output as the source card, so it seems like I probably had it cloned successfully.
If I find another HID-capable reader, Iāll try it again, I think itās just a no-go for what I have available.
Your looking at it wrong,
Itās not that hid mode is weaker on your implant, itās on the reader side
The reader at work is likely not strong, not tuned super great, or you arenāt finding the sweet spot
Wave ID products have a very nice punch to them
You should also verify your write,
Write the same thing to an Iso card and see if that worksā¦ if it does, compare the read data on your proxmark
Iāve mentioned that Iāve cloned this prox card to other chips and they all work, and that the proxmark verifies that my NExT chip reports the same data, I donāt really know how to validate my process or results any more than that.
Just throwing this out there "Just in case "
You say HID Proxcard II - Make me think of HID Duo Prox which is a LF & HF Card!
Could it be possible that the readers you are using are ālookingā for the HF side.
I know it is unlikely, but just thought we should rule that out 100%
These were my indicators as to why I thought this might be the case
Similarity between (Proxcard 2 - Duo Prox)
BUT, then I read this, and realised I probably just wasted my time writing thisā¦damnā¦and I still amā¦oh wellā¦I really should stopā¦maybe after the quote that blows my theory out of the waterā¦
But, If you think that is a possibility, then give a hf search a try and/or try your Daignostic card on your reader
If it is running a dual frequency system, you MAY be able to enroll the HF side and have some luck if the HF antenna is better placed 
TAKE 2 
Also, is it a possibility that you can open up one of the readers to inspect the location of the LF antenna?
Could you / have you tried putting your Diagnostic card on the reader? this will do a couple of things:
-
Change the field so that the reader may actually read your NExT ( Obviously not a suitable solution, but answers the question about the readers)
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At the very least, It will also show you the duty cycle, so when you are presenting your NExT, you will see how frequent the read pulses are and therefore how slow / still you need to present your NExT
You may also be able to present your LF xFD in conjunction wirth your Diagnostic Card ( However this may just show the trace of your Diag. card, rather that the readers, I have never tried this myself )
I think my final suggestion would be, if you arenāt already, to swipe across the face of the reader, Very slowly or using your new found knowledge of the duty cycle at a suitable speed
Ok, the last one was not actually my final suggestion, SOā¦ another option, if you think you would get a FlexEM is to buy a cheap T5577 āflexā the same diameter as the FlexEM from AliExpress or elsewhere, and test that on your readers to confirm before buying
Iāll keep thinking on this, but let us all know how you go
No joy there, but I didnāt expect it to work as we use bog standard ProxCard II
[usb] pm3 ā hf search
[!] 
No known/supported 13.56 MHz tags found
Sadly no, my employer is just a tenant, so we donāt own or maintain the equipment, and itās secured behind smoked glass so I canāt even see what reader they use.
I did get some T5577 coins that look similar to the to the FlexEM, and they do work well on the Wave ID pcProx reader I have here, Iāll try them at the office when I go in again. Iāll take the diag card and xFD as well. The card reader is in a camera-watched elevator, so I canāt spend too much time in front of it, but will try to validate the antenna placement.
I have spent significant time this morning with the Wave ID pcProx reader I have here at home and I have gotten it to occasionally register the NExT in HID mode in one spot when touching the skin over the end of the chip (while it reads t5577 coins, rings, and stickers from a considerable distance). So my NExT is working, but the strength while in HID seems to me to be very subdued, which calls back to my original question. In comparison, in EM410x mode it is read from about 1/2 inch away, so it seems to be stronger in EM401x than HID.
Assuming the coin works as expected Iāll likely get a FlexEM to be dedicated to work access, and use the NExT for home projects in EM410x mode.
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Iāve experienced the same issue with my NExT on the HID readers at work. With cameras on all of the readers, I needed something that would be quick and inconspicuous. I used the T5577 pvc tokens, the range compared to the company issued badge was unnoticeable. In my case they worked so well I implanted them into the cuff of my work shirts until I got my FlexEM installed.
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Thatās genius!
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I suggested that @KaiCastledine KSEC, make a little slit pocket in the wrists of their hoodies for the same thing
I live (and work) in cargo shorts and graphic t-shirts, so a clothing based solution isnāt as elegant for me, but I love the idea!
In other news, based on the compatibility spreadsheet I got a Smonet Smart Lock this week. Unfortunately Iāve been unable to get it to read the NFC side of my NExT, so Iām 0 for 2. It reads every other tag Iāve tried, but my NExT is the only NTAG216 I have, so I have some coming to test whether it doesnāt work with NTAG216, or if it just doesnāt like my implant.
Neat bonus feature though, the lock does read my Quontic banking ring, so at least I have a dual-purpose wearable 
Iāve just ordered it, did you ever get it to work?
Youāll have no problems, just expect inconsistent reads for the first 2 weeks, after that, itāll just keep improving until its reliable 100% of the time if not already
My flipper reads it as a Mayfair classic 1K. Can that be written to the NFC side of NExT? Or to the t5577? Or am I going to have to copy this card to my xmagic ?
Sorry. WHAT was read as Mifare Classic?
No, they donāt work like that.
Exactly
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Thatās what was going through my head lol. Unless Iām misreading the compatibility chart it was supposed to be cloneable onto the NExT implant?
Yeah I thought so I was just confused because other posts made me think that it was compatible with my NExT chipā¦
I am reeeeeally happy that I got the Xmagic chip now lol
I cloned it to my xmagic successfully, I just need to install the lock to give it a try now.
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I feel like thatās because they are either going to be used with a large form factor card, or a powered NFC payment device like a phone or a watch(Iāve had read ranges 6"+ with my phone) so they donāt need to be picky about good the antenna is