Tools
These are some common tools used to work on this device. You might not need every tool for every procedure.
Background and Identification
Optimus-branded devices have been produced running both Android and Windows Phone 7 operating systems. The L90 was the last model created in the third generation L series in 2014. The L90 is a 100% touch screen operated device and contains some impressive features such as a 1.2 GHz Quad-core processor, long lasting 2,400 mAh battery, and a 5 megapixel camera with auto-focus, putting it in direct competition with Apple's iPhone 5.
Troubleshooting Page
Link to a Troubleshooting page can be found here: LG Optimus L90 - Troubleshooting Page