The LG G3 has been spotted online with code name “LG B2” with 4 model variants, namely the LG-D850, LG-LS990, LG-D851, and LG-VS985.
Today, Another Mysterious handset from LG with model number LG-D725 was spotted in a leaked document as B2mini, As you can see from below screenshot, The LG D725 might indeed be the LG G3 mini for AT & T, if B2 is the code name of LG G3.

The LG D725 comes with a 8MP rear camera (Highest Image Resolution:3264×2248).

The LG D725 features a display of unknown size of 720×1280 pixel resolution and runs on Android 4.4.2 kitkat OS, According to the handset’s UA Profile Spotted on LG Offcial website
Another database entry found on LG website confirmed the existence of the LG D725, As shown in below screen shot, The handset is on its way to AT&t.

stay tuned for additional details on LG G3 Mini for AT & T (Model:LG-D725).