Problem & Solution
Carrying multiple thick plastic keyfobs or heavy access cards for your apartment, office, or gate leads to clutter and frequent misplacement. Purchasing official replacement badges from building management is often expensive and time-consuming, leaving you stuck with inconvenient entry solutions.
The 5YOA 13.56MHz CUID Changeable RFID Sticker solves this problem by offering a flexible, rewritable wet inlay tag. Because it utilizes CUID architecture, Sector 0 Block 0 can be directly rewritten using an NFC-enabled Android phone and the popular Mifare Classic Tool (MCT) app, eliminating the need for bulky hardware programmers.
Simply duplicate your original S50 1K access card onto this self-adhesive sticker and attach it behind your phone case or inside a slim wallet. You get instant, hands-free access control without carrying extra keys or paying costly badge replacement fees.
Who Is It For?
Tech enthusiasts, smart home builders, and apartment residents who want to streamline their daily carry by consolidating access cards, gate tags, and building badges directly onto their smartphone.
IT security professionals, system administrators, and makers needing a budget-friendly, reliable batch of CUID wet inlays for testing access control readers and cloning 13.56MHz ISO14443A credentials.
Key Features
- CUID Sector 0 Block 0 RewritableEnables full UID modification directly from an NFC-enabled Android smartphone via Mifare Classic Tool (MCT).
- 13.56MHz S50 1K Chip CompatibilityMatches standard ISO14443A frequency protocols used by most residential and commercial door access readers.
- Ultra-Thin Wet Inlay AdhesiveApplies easily to phone covers, plastic cards, or notebooks for discrete and convenient daily access.
- High-Speed Data Transfer & Anti-CollisionProvides rapid reader response times without lag or false reads when scanning at building terminals.
- Bypasses Standard UID Write LocksAllows rewriting even on readers that block standard UID (FUID/UFUID) tags, ensuring reliable cloning performance.
Pros & Cons
Pros
- Supports direct UID rewriting via Android phone (MCT app)
- Extremely affordable solution for duplicating entry cards
- Strong self-adhesive wet inlay backing
- High rating and proven volume with over 4,000 units sold
Cons
- Requires an NFC-enabled Android device or RFID duplicator to write data
- May require anti-metal shielding if placed directly against a metal phone body
FAQ
Yes, because this tag uses a CUID chip, you can rewrite Sector 0 Block 0 using an NFC-capable Android phone and the free Mifare Classic Tool (MCT) app.
Standard UID tags have a locked Sector 0 that cannot be changed by phones. CUID tags allow mobile devices to rewrite Sector 0 Block 0 directly without specialized desktop hardware.
Yes, it works well through non-metallic phone cases. If your phone has a solid metal backplate, you may need an anti-metal ferrite sheet behind the sticker to prevent signal dampening.
Yes, CUID tags can be rewritten multiple times whenever you need to reconfigure or re-clone your access credentials.
Final Verdict
The 5YOA 13.56MHz CUID Changeable RFID Sticker is an exceptional, low-cost solution for duplicating 13.56MHz access badges. With direct Android MCT rewriting capability, a flexible wet inlay form factor, and a outstanding 94.4% rating across thousands of orders, it delivers top-tier functionality for anyone looking to eliminate keycard clutter.