Motorola RAZR V3

Does anyone know that the 1:1 displayed resolution of the picture IDs are? (or it's exact ratio..)

I want to upload jpgs of that resolution to my phone to use as picture IDs to avoid the poor resizing/resampling it does with oversized photos.

I tried photos of 176x132 (same ratio as 640x480 photos) but bottom 2 lines look like a repetition of the top 2 lines.

Thanks