Here you can download dual band wireless driver.
File: dual_band_wireless_driver.zipDriver version: 2.2.5File size: 11 876 KBOS: Windows 7 and 8
Here you can find lg optimus l9 usb driver download.
File name: lg_optimus_l9_usb_driver.gzipDriver version: 1.5.8File size: 1 369 KBOS: Win XP, Win Vista, Windows 7, Windows 8