Learn how to read the liquid damage indicator (LDI) on the Google Nexus 4.
Liquid Damage Indicator (LDI)
T-Mobile devices have an indicator that shows if it has been subjected to liquid damage. To read the Liquid Damage Indicator (LDI), follow these steps:
The Liquid damage indicator(LDI) is located where the SIM tray is inserted. It is very difficult to see and only a sliver of the LDI is visible when the SIM card tray is removed. Red indicates liquid damage, white indicates none.