Solution: Lonsdor K518ISE/K518S “Device fault26” Error
Car Key Programmer / September 22, 2021

How to solve Lonsdor K518ISE/ Lonsdor K518S Key Programmer “Device fault26” error? This is a guide to solve the problem.   Solution Hold and press 2 buttons marked in red meanwhile, you’ll go access to the interface.   Press “Factory Setting”. Lonsdor K518 will show a prompt: “This will uninstall all apk, and format all user data, also the device will automatically restart and return to factory settings. Please be careful!!!”. Press “OK” and wait for about 1 minute.   Press “Repair”. A warning displays: “This operation will clear apk related data and reinstall, please operate carefully!!!”. Press “OK”.   Follow the path to find a repair file: Android desktop >> Circle button >> File manager >> Internal storage >> emulated >> 0 Note: if do not find the file, please connect Lonsdor K518 to a PC to put the file in.   Press repair file. A install blocked prompt shows: For security, your tablet is set to block installation of apps obtained from unknown source. Press “Settings >> Unknown sources >> OK”.   You’ll come back to same interface. Press repair file again. And then “Next >> Install >> Open”.   Connect Lonsdor K518 to WiFi, press “Update >>…