The Samsung Galaxy SmartTag+ with UWB technology does not work with the Galaxy Z Flip 3. Here are the reasons and alternatives:

- The Galaxy SmartTag+ requires a UWB (ultra-wideband) compatible device to use the camera and AR search function. Compatible devices include the Galaxy Note 20 Ultra, Galaxy S21+, Galaxy S21 Ultra, Galaxy Z Fold 2, and other newer models with the same technology.
- The Galaxy Z Flip 3 does not support UWB technology.

For the Galaxy Z Flip 3, you can use the Samsung Galaxy SmartTag (without UWB technology), which works with Samsung devices running Android 8.0 or higher and with at least 2 GB of RAM. This model uses Bluetooth and does not have the advanced location features based on UWB.