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After installing the application from this download link, you must “trust” the developer before using the app.
See instructions below.

Step 1

Open the download link using the Safari app.

Step 2

Select Install application.

Step 3

To use the app, first we need to trust the developer.

Step 4

Open the Settings app and scroll down to General.

Step 5

Scroll down to Device Management.

Step 6

Select Elite Technology Group, LLC

Step 7

Select Trust “Elite Technology Group, LLC”

Step 8

Select Trust again then open the PRO Service app.

Step 9

Success! Make sure to allow all permissions.