ETEKJOY 10 PCS Writable 125kHz RFID Sticker Coin Adhesive Back T5577 Proximity ID Card Token Key Tag Rewritable Dia 25mm

Got these rfid tags when I needed some stickers instead of keychain pieces, and these worked great. My only issue is that they stand out on my black phone case, but that's on me. They are plasticy on the outside, similar to a dry-erase board, so you can't color them in with a sharpie. The adhesive is great, it's held up quite well since I stuck one on my phone case a few months ago. And it hasn't not worked once. Super convenient when my phone's easier to reach than my wallet when my hands are full.

Make sure you scan your fob before ordering parts. Reader will identify the correct type. I originally stuck this on my phone to test and worked fine. Made a small recess in my case on the inside near the camera with a burr grinder and did a hidden install. Still working the same. Nice when you have your phone and don’t want to take a set of keys. Very low profile and adhesive is aggressive if you just want to go the easy route.

Go quality and good price

I purchased these because I got tired of carrying around my key fob. I was trying to minimize my EDC. I figured I always carry my phone so it would be great if I could dump the fob for something I could stick in my phone case. The maintenance guy at my building claimed they could only do the HID brand fobs. So using some equipment my friend had I copied my fob and wrote it to this coin. It worked perfectly. No more fob! My only gripe is these are a tad thick. They won't work in most phone cases. I did manage to get it to work with one of my 3 cases. The adhesive is strong but not strong enough to just stick to the outside of something like a phone that's always in use.

I am able to program these for building entry FOBAnd stick to back of phones

Does not work with Keysy programmer

Very easy to program with a flipper zero

I was concerned with the reviews but these work with my flipper. I wanted them to make a door key for my building and easy work they write. if you want them for a flipper no fear they work .