STEP 1
The "Unknown sources" option should be activated.
Activate it by clicking: Settings → Security → Unknown sources and tick the box.


STEP 1
The "Unknown sources" option should be activated.
Activate it by clicking: Settings → Security → Unknown sources and tick the box.
STEP 2
Afterwards, confirm the activation by clicking 'OK'.
STEP 3
If the "Unknown sources" option is activated, your device is ready for the mobile app installation.