The elusive white iPhone is making an appearance in AT&T’s online systems, but there is still no indication when the phone will be available.

[ad#Google Adsense 300×250 in story]The iPhone is showing up in AT&T’s Online Account Management system, according to a report on BGR. There are listings for a white iPhone 4 16GB model and a 32GB model. AT&T also has 32GB and 16GB models of the iPhone 3GS, as well as a 16GB white iPhone 3G.

Signs at Apple’s retail stores in December listed the white iPhone as becoming “available spring 2011.”

Apple has never given a reason for the delay of the white iPhone 4, other than it has “proven more challenging to manufacture than expected.”

Originally scheduled to be released shortly after the black iPhone, the white iPhone 4 delayed in late July until “later this year,” and again in October until spring 2011.