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Why I can’t read or write my NFC tag ?

There may be many reasons which could explain why you are unable to read or write an NFC tag.
There are things you can try in order to identify and fix what is preventing you from reading or writing your tag, here is the list.

1. Check that your device is NFC capable.

You can get this information from the technical documentation of your device or on this website : https://devices.nfc.help/

2. Check that NFC is turned on.

To turn on NFC, go to Settings, Wireless and networks, more, and toggle NFC.

3. Check that your NFC antenna is working properly.

If you use a case on your device, it may be possible that it interferes with the signal and prevents reading and writing the tag. Be mindful of battery swapping because the NFC antenna is often situated on the battery.

4. Check that your NFC tag is working and properly placed.

An NFC tag is composed of a chip and an antenna, it’s really important to take good care of it and not bend, cut or burn the tag. Some NFC tags can have problems if they are on a metallic surface.

5. Check that the NFC technology of the tag is compatible with your device.

There are a lot of NFC tags with different technologies, check that your device is compatible with said technology. For example, most phones are not compatible with the Mifare Classic technology (in this case, the app displays “Not supported”). It is recommended to buy universals NFC tags to avoid compatibilities issues, like NTAG213, NTAG215 or NTAG216.

6. Check that the tag is not protected.

For obvious security reasons, some NFC tags are protected against reads and writes.
It is true when it comes to access cards, credit cards, transportation cards....
You can’t read, write, copy or emulated this kind of NFC chip.

7. Check that the tag is not locked.

It is possible that your tag is locked and read only, this information can be checked on the “Read” tab.
If your tag is indeed locked, you won’t be able to write on it.

8. Properly scan your tag.

It is very important that you place the tag properly on your device during the entire operation, whether reading or writing. If you move your tag during the operation, errors may occur. If so, try again.

9. Check that the memory capacity of the tag is enough to write your data.

Before writing on your tag, make sure that your tag has enough memory to write the data you want to write on it.

10. I checked everything and I still can’t find the problem.

If you’ve already checked everything and you still have problems, you can contact us.
Important : in order to give out the best answer, please send all possible details like your your device model, the kind of NFC chips you’re using, the checks you performed, etc…

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