As discussed in Searching for Devices, you can use the filter to set search constraints. You should set at least one constraint.
You can check the APIs you want. Note, checking an API does not exclude APIs that are not checked.
MIDP 1.0, MIDP 2.0
CLDC 1.0, CLDC 1.1MMAPI 1.0, MMAPI 1.1
WMAPI 1.0, WMAPI 1.1, WMAPI 2.0
The device resolution.
Maximum Image Width/Height
The maximum image size that the device can display.
Physical Memory Size
The built-in memory size.
Memory limit in bytes at runtime.
Number of Colors
The number or colors the device’s display supports.
Supported Image Formats
Check the image type. Unchecked types might still be supported.
To see the full list of WURFL contstraints, go to: http://wurfl.sourceforge.net/help_doc.php.
See also Searching for Devices.