Wireless carrier Vodafone Germany was the source of minor attention on Monday with a spotting of white iPhone 4 listings in its inventory system. Per Engadget, entries for both the 16GB and 32GB versions of a “weiß” (“weiss,” or white) version showed up alongside the usual black (“schwarz”) versions. The source who leaked the images claimed these weren’t just placeholders and would have a launch “soon.”

The timing should be treated with caution as Apple has officially delayed the alternate color scheme until spring 2011. A spring debut even in March could have it on sale for three months or less before it was replaced with the iPhone 5. A white iPhone 4 isn’t thought likely to co-exist with the iPhone 5 as Apple has never had more than one previous-generation iPhone on sale at a time.

Unofficial reasons for the virtual cancellation of the white iPhone 4 have been broad. Most have pinned it on inconsistent coloring for the iPhone’s glass. In one circumstance, it was claimed that the white hue combined with the iPhone 4′s design interfered with the camera, but this hasn’t been proven so far.

Stay tuned for additional details as they become available and if you’ve been hankering for a white iPhone 4 since June, I’m not sure what to say.