Compatible Devices
EZ Sign® NFC Compatible Devices
Smartphones Tested and Verified for EZ Sign Updates
EZ Sign® NFC works with a wide range of NFC-enabled smartphones.
To help customers enjoy a smooth experience, we have tested various smartphone models and verified their compatibility with EZ Sign.
Devices that achieved stable updates under our testing conditions.
Devices where performance may vary depending on the EZ Sign size, display color type, or smartphone positioning.
Devices where evaluation results have not yet been finalized.
Compatible Devices
Internal Test Results
| Manufacturer | Model | OS Version | Status | Tested Products | Notes |
|---|---|---|---|---|---|
| Apple | iPhone 11 | iOS 18.5 | Verified Compatible |
4.2″ 2C4.2″ 4C 2.9″ 2C2.9″ 4C
|
All tested configurations were confirmed to work successfully. |
| Apple | iPhone 13 Pro | iOS 17.5.1 | Verified Compatible |
4.2″ 2C4.2″ 4C 2.9″ 2C2.9″ 4C
|
All tested configurations were confirmed to work successfully. |
| Apple | iPhone 16 | iOS 18.6.2 | Verified Compatible |
4.2″ 2C4.2″ 4C 2.9″ 2C2.9″ 4C
|
All tested configurations were confirmed to work successfully. |
| Apple | iPhone 16 Pro | iOS 26 | Verified Compatible |
4.2″ 2C4.2″ 4C 2.9″ 2C2.9″ 4C
|
All tested configurations were confirmed to work successfully. |
| Samsung | Galaxy S25 | Android 15 | Verified Compatible |
4.2″ 2C4.2″ 4C 2.9″ 2C2.9″ 4C
|
All tested configurations were confirmed to work successfully. |
| Samsung | Galaxy A25 5G | Android 15 | Verified Compatible |
4.2″ 2C4.2″ 4C 2.9″ 2C2.9″ 4C
|
All tested configurations were confirmed to work successfully. |
| Pixel 8a | Android 16 | Verified Compatible |
4.2″ 2C4.2″ 4C 2.9″ 2C2.9″ 4C
|
All tested configurations were confirmed to work successfully. | |
| OPPO | Reno（PCAM00） | Android 11 | Verified Compatible |
4.2″ 2C4.2″ 4C 2.9″ 2C2.9″ 4C
|
All tested configurations were confirmed to work successfully. |
| Xiaomi | Redmi 10T（A101XM） | Android 13 | Compatible with Conditions |
4.2″ 2C4.2″ 4C 2.9″ 2C2.9″ 4C
|
The 4.2-inch 4-Color model may experience unstable updates when using the display side. For better reliability, we recommend updating EZ Sign from the back side. |
| Xiaomi | Redmi 11T（20181111RG） | Android 13 | Compatible with Conditions |
4.2″ 2C4.2″ 4C 2.9″ 2C2.9″ 4C
|
The 4.2-inch models cannot be updated from the display side. Back-side updates were successful in all 5 tests. The 2.9-inch models have been verified to work. |
| Pixel 7 | Android 16 | Compatible with Conditions |
4.2″ 4C2.9″ 4C
|
The 4.2-inch 4-Color model showed unstable update performance from both the display side and the back side, with successful updates in only 1 out of 5 tests. The 2.9-inch 4-Color model has been verified to work. Configurations that have not been tested are not included in this evaluation. | |
| Samsung | Galaxy S23（SM-S911U） | Android 15 | Under Testing |
Pending
|
Evaluation is currently underway. |
Verified Compatible
Devices where EZ Sign updates were successfully confirmed with the tested product configurations shown in the table.
Compatible with Conditions
Devices where update performance may differ depending on:
- EZ Sign size
- Display color model
- Smartphone positioning
Under Testing
Devices where testing with the latest app version is still under evaluation.
Tips for Reliable Updates
4 Tips for More Reliable EZ Sign Updates
NFC antenna positions and power performance vary depending on the smartphone model. If an update fails, please try the following steps in order.
-
01 Remove Your Phone Case
Thick cases, metal parts, and wallet-style cases with cards may reduce NFC communication performance.
-
02 Align the NFC Antenna Position
Slowly move your smartphone around the upper or center area of the back side to find the position where EZ Sign responds.
-
03 Try Updating from the Back Side of EZ Sign
For some smartphone models, updating from the side without the display can bring the NFC antenna closer and provide a more stable connection.
-
04 Keep Your Phone Still Until Completion
4-color models may take approximately 30 seconds to complete an update. Keep your smartphone and EZ Sign together until the completion message appears.
Some AQUOS series smartphones may experience unstable updates depending on the model. At this time, we do not have sufficient internal test data for individual AQUOS models to provide a general compatibility rating. Please remove your phone case and try updating from the back side of EZ Sign.
Before You Use
Please Check Before Use
Do smartphones with the same model name always work the same way?
Not always. Results may vary depending on the OS version, carrier model, phone case, individual device differences, and app updates. This compatibility list shows our test results at the time of evaluation and does not guarantee operation on every device.
Can I use a smartphone that is not listed?
A smartphone that is not listed does not mean it is incompatible. It means that:
• We have not tested the device yet
• We do not currently have enough evaluation data to publish the result.
Additional devices will continue to be tested and added. Even NFC-compatible smartphones may have different update stability depending on NFC antenna position and power performance.
Can I purchase EZ Sign if my smartphone is marked "Compatible with Conditions"?
Yes, you can use EZ Sign. However, please carefully review the conditions shown in the compatibility table, including EZ Sign size, display color type, and recommended update position.
In particular, the Google Pixel 7 with the 4.2-inch 4-Color model is not recommended because update performance was found to be highly unstable during testing.
What should I do if an update fails?
Please try the following:
1. Remove your phone case.
2. Adjust the smartphone's NFC antenna position.
3. Try updating from the back side of EZ Sign.
4. Avoid metal desks or metal surfaces.
5. Keep your smartphone still until the update is complete.
Check the App and Update Instructions
You can find app download information, basic operation instructions, and troubleshooting guidance here.
*This page is based on internal device testing results as of October 8, 2025.