The LG Optimus One user manual can found on the LG product support page in the Manuals and Download section. The support page also contains a help library, which includes videos of common tasks such as resetting the phone, warranty information, software updates and instructions for using PC Sync.
The LG One 500 product support page also contains links and information for registering a new phone, updating firmware or scheduling a repair through an authorized dealer. In addition, there are links to contact customer service representatives through chat and email. The page also lists several customer reviews of the phone.