If your
Lonsdor K518S /
K518ISE device met those problem:
Problem 1: Cannot enter the main interface of the device.
Problem 2: It takes a long time to enter the main interface of the device.
Problem 3: Some menus are lost in the device
Here is the solution to fix all above problem:
![Lonsdor K518S APK](/upload/service/19070115620315163626.jpg)
Hold those two buttons marked in red at the same time, and you will enter the interface below.
![Lonsdor K518S APK](/upload/service/19070115620315217321.jpg)
Press “Uninstall APK” once, and you will enter the interface below.
![Lonsdor K518S APK](/upload/service/19070115620315253709.jpg)
Press “OK” and you will enter the interface below again.
![Lonsdor K518S APK](/upload/service/19070115620315287401.jpg)
Press “Oldest APK” once and you will enter the interface below.
![Lonsdor K518S APK](/upload/service/19070115620315344561.jpg)
Enter the password and you will see the interface below. Connect the device to WiFi and then press “
![Lonsdor K518S APK](/upload/service/19070115620315357397.jpg)
Press “OK” to update the device.
![Lonsdor K518S APK](/upload/service/19070115620315379020.jpg)
The device will be normal as before after updating.