Leon RS2000 - User Smartphones; Install APP

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UserSmartphones
Whether it’s an administrator or a client, all smartphone
usersneed to install the app ‘Key Butler’. Make sure your phone
is already connected to internet before installing the app.
Install APP
Step 1.Open ‘Apps’ group
Step 2. Tip ‘Play Store’
Step 3.Search and choose
‘Key Butler’
Step 4.Press ‘INSTALL’