need root file sm-g920f

Welcome to Octoplus/Octopus Box Samsung software version 2.2.1
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To connect SM-J200H phone you have to perform the following steps:
1. Disconnect USB cable from phone.
2. Go to Menu->Settings->More->About Device.
3.Tap on "Build number" 7 times to enable developer options.
4. Go to Menu->Settings->More->Developer options.
5. Turn on "USB Debugging" option.
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To connect SCL24 phone you have to perform the following steps:
1. Disconnect USB cable from phone.
2. Go to Menu->Settings->More->About Device.
3.Tap on "Build number" 7 times to enable developer options.
4. Go to Menu->Settings->More->Developer options.
5. Turn on "USB Debugging" option.
6. Go to dial window.
7. Enter "*#0808#" number.
8. Select "DM+Modem+ADB".
9. Press Home button.
10. Restart phone.
11. Press "Read Info" in software.
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To connect SM-G920F phone you have to perform the following steps:
1. Disconnect USB cable from phone.
2. Go to Menu->Settings->More->About Device.
3.Tap on "Build number" 7 times to enable developer options.
4. Go to Menu->Settings->More->Developer options.
5. Turn on "USB Debugging" option.
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Platform: Samsung Android
Selected port: COM5
Selected model: SM-G920F
Please, press "OK" button on the phone to allow USB debugging..
Detected phone model: SM-G920F
Firmware compiled date: Fri Sep 25 16:07:03 KST 2015
PDA version: G920FXXU3COI9
CSC version: G920FXEU3COJ2
SW version: G920FXXU3COI9
Phone SN: RF8GB08W7EW
Android version: 5.1.1 (LMY47X)
Checking Root:
Phone is not Rooted.
Phone unlocking failed
Performed by 2.2.1 software version