Help ideal dimensions for background picture?

[kimberlyd86]

The last time I changed the background photo on my phone, it did something new. It zooms in on the picture and as I slide from screen to screen, the picture moves too so you're seeing a different part of it. It allowed me to crop the photo, but no matter what I do, when I slide over to the left-most screen, or right-most screen, a stripe of white appears because the photo isn't large enough..

So my question is what are the ideal dimensions of a background photo to avoid those stripes?