[Update]

1)Sprint LG G3 to feature 3GB RAM – Confirmed

2)Sprint LG G3 User manual available for download

3)Find and update the software version on Sprint LG G3 (LG-LS990) – Intial release: LS990ZV4

Sprint has revisied the UA Profile of LG-LS990, The Software Number in the UA profile was changed to “LS990ZV4”.

Here are the Sprint LG G3 (LG-LS990) Specs changed in the latest UA Profile:

RAM: 3GB of RAM

Rear-facing camera: 13MP

Front-facing camera: 2.4MP

The latest UA Profile still shows a WQHD (2560×1440) display. The OS version entry still reads: “Android 4.4.2 / M8974AAAAANLYD2145A.1”

Source: http://device.sprintpcs.com/LG/LS990-SPRINT/LS990ZV1.rdf