I own a flipper zero, proxmark 3 easy, proxmark Rd 4.0, proxmark 3 x, icopy x.
I couldn’t read the chip with any of the proxmark stuff sadly dunno if invalid command or what.
My chip seems to be so deep in my hand i can’t feel it with my fingers seems to be close to injection point but closer to thumb I can’t tell if it’s a muscle or the chip.
I can’t see led is it for both rfid and nfc reads or only nfc reads?
Nfc seems to be write protected when I read it with flipper zero as that’s the only device that can seem to read it my phone can’t.
RFID seems to be no password protection but won’t let me copy a T5577 card that is a hid card info on it to my chip in my hand just contoualy says it’s trying to write make sure it’s not password protected. Of its nfc is password protected is the rfid password protected do the chips talk to each other since it’s all in one tube.
From my understanding both the lf and hf chips are rewritable with anything you want so long as it’s capatible with those chips it has.
Will my chip ever surface more or it’s there still trauma to the site. Like blood pooling or whatever does it need to calus or something to be visable? I see others close to the skin you can tell there’s a chip there.
It will take about two weeks for the swelling to go down, een if you can’t see or feel it at this point.
I recommend not trying to write to it until you can consistently get good reads off of both the LF and HF sides. The swelling will be interfering with the ability to read/write to it.
did you not know what the implant did before you bought and installed it? what exactly are you wanting to do with the implant?
the data on the NtagI2C is changeable, but the UID is fixed, the UID is what’s needed in order to make a clone, so while it can’t be used for cloning, it’s memory rewriting has many useful applications.
so the UID or serial is set at the manufactuer level, theres data blocks where you can write and rewrite your data like a URL etc, you can still enroll it into systems if need be using the UID (depending on the protocol) if you wanted a changeable UID then the xmagic wouldve been ideal but im unsure how well supported that since its a mifare dont think you can read mifare with iOS but android for sure (still learning NFC/RFID so i may be wrong if so the big boys should correct me!)
but wanting to change the UID would be in a specific usecase, the architecture of ntags and mifare classic are different, so a mifare classic wouldn’t be applicable if an ntag is needed & vis versa, also UID lengths etc etc.
I wanna program both tags in mine but still as it healed back from November 2025 I can’t write anything on high frequency tag or the low frequency tag I can read them but not write to them seems like it has a password on it preventing it from being written to if it comes from manufacturer with a password can I have it so I can reset it myself to program it to something else I just wanna write to my own tag in my own body.
Ok for your phone you may need a RSP to improve performance.
In short, there is a non-default password set on the ntag chip in the NExT v2 but it does not protect any user writable memory. It only requires authentication to make changes to the config memory, which can be dangerous / destructive. The password is given on the product page. In other words, unless something changed on the chip, you should have no problem writing data to it.
To write to the nfc side once the swelling goes down and you get consistent reads with a phone, i posted a guide here Dual-Implantat NeXT V2 mit LED - #28 by saph basicly it needs to be formatted first.
