View online or download lg optimus l90 user manual. Download the manual and user guide of lg optimus pro. View and download lg optimus l70 user manual online. Related manuals for lg optimus l90 cell phone lg optimus l9 p769 user manual lg optimus l9 has a sophisticated, slim design that easily fits in your purse or pocket, and highend features you can take with you anywhere. Lg optimus l9 has a sophisticated, slim design that easily fits in your purse or pocket, and highend features you can take with you anywhere. This device is also known as lg d405, lg optimus l90. If you are looking for detailed technical specifications, please see lg l90. View and download lg optimus l90 user manual online. The lg optimus l90 is a smart phone from the third generation of the optimus l series of phones manufactured by lg electronics. To download a user guide, please go to the category of your equipment, choose the brand of your equipment, then click on the model which you are looking for.