From HowardForums Wiki
This section currently lists phones by model. They can problably be grouped into a few groups when enough details has been filled in.
|Models||OS||Wallpaper size||Secondary wallpaper||Contact image¹|
|6131/6133/6126||S40 3 FP1||240x320||128x160||?|
¹ An easy way to find this value: Use a large image. Using the build-in image editor, crop to portait proportions as large as possible. Use the image for a contact, save the image back to the gallery, read image size.