NExT V2 read problems

[Papagajcik]

Hello, after using this fix for next v2, I can write to the chip, even format it and write content using NXP Tag Writer and NFC Tools, but I can only do this with Samsung A series phones. Nothing else can read the chip, I have unsuccessfully tried Galaxy S10, various iPhones, Flipper Zero, Proxmark 3 RDV 4 (magnetic coupling is visible, but no card identified).

Can you please advise me how to diagnose and ideally fix the situation?

Is there a way to verify the fix is applied fully? All the commands were confirmed, but the process is kinda sketchy. Thanks for any tips.

Memory DUMP attached, can you help me check it?

Data

[Pilgrimsmaster]

@Papagajcik

Hello, after using this fix for next v2

@Papagajcik

Is there a way to verify the fix is applied fully?

Can you clarify what the “fix” is you are talking about?

@Papagajcik

but I can only do this with Samsung A series phones

This would be an odd issue.

@Papagajcik

I have unsuccessfully tried Galaxy S10, various iPhones, Flipper Zero, Proxmark 3 RDV 4 (magnetic coupling is visible, but no card identified).

It sounds more like a coupling issue.

4 things

How long ago was your NExT V2 installed?

Have you checked this?

WIKI - NFC phone performance

Phones can be finicky… Check out this resource OR For a list compiled by Cyborg, tested by cyborgs and tested by Cyborgs, see below List of compatible phones: ASUS Asus ZenFone 8 CAT s41 s42 Google Pixel 2 3XL OG Pixel Pixel 3a Pixel XL Pixel 4a Pixel 5 Pixel 6 Pixel 6 Pro Pixel 7 Non-Pro Pixel 7 pro Pixel Fold Pixel 8 Pixel 8 Pro Huawei Mate 20 P20 lite P20 P10 Honor Play P30 iPhone (NFC Tools app for writing, and the GoToTags app, also SimplyNFC , Taginfo or TagWriter) iPho…

Do you have a repeater sticker?(highly reccomended)

Have you checked the placement guide?

Wiki - Repeater Placement Guide

Now that the repeater stickers are available, I think it would be a good place to start documenting the best placement of the stickers on the devices that we have available to us. I will try to keep the same and similar format as the wiki-nfc-phone-performance topic. You can use the Xfd or Diagnostic Card to find the best placement. For those that do not have access to these tools this can be a refference point. This resource is a good starting point on figuring where to zero in your repeat…

[Papagajcik]

Thanks for the answer, I tried to read the memory from the old article because I couldn’t even write. I don’t know what the problem is and I’m asking for advice. For the last few days, I haven’t been able to read the chip at all. I have NExT V2 two months.