p5220 imei repaire or not

hi i receive p5220 with imei 0044xxxxxxxx.so tablet with not registred in network.

Code:

Welcome to Octoplus/Octopus Box Samsung software version 2.2.0
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To connect GT-P5220 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: COM1
Selected model: GT-P5220
Please, press "OK" button on the phone to allow USB debugging..
Please, press "OK" button on the phone to allow USB debugging..
Detected phone model: GT-P5220
Firmware compiled date: Wed Feb 26 22:25:44 KST 2014
PDA version: P5220XXUANB6
CSC version: P5220OJVANE1
SW version: P5220XXUANB2
Phone IMEI: 004999010640000
Phone SN: RF1DA6DAY1X
Android version: 4.2.2 (JDQ39)
Rebooting phone in Recovery mode...
Checking Root:
Phone is not Rooted. Rooting phone...
Rebooting phone failed.
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Platform: Samsung Android
Selected port: COM1
Selected model: GT-P5220
Reading info, please wait...
Proper android device not found. Make shure that "USB debug" option
on the device is turned on.
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Platform: Samsung Android
Selected port: COM1
Selected model: GT-P5220
Selected file: C:\Users\CLINIC PC\Desktop\Cert-GT-P5220-
358263054437944-RF2F31VH1WV.cert
Please, press "OK" button on the phone to allow USB debugging..
Detected phone model: GT-P5220
Firmware compiled date: Wed Feb 26 22:25:44 KST 2014
PDA version: P5220XXUANB6
CSC version: P5220OJVANE1
SW version: P5220XXUANB2
Phone IMEI: 004999010640000
Phone SN: RF1DA6DAY1X
Android version: 4.2.2 (JDQ39)
Checking Root:
Phone is Rooted.
Checking Certificate file...
Certificate file successfully checked
Writing Certificate...
Executing exploit...
Exploit has been executed successfully
Checking for compatible Certificate and phone...
Certificate is correct
Phone will restart now. Please don't disconnect cable!
Certificate has been written successfully
Please, restart the phone to apply changes
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Platform: Samsung Android
Selected port: COM1
Selected model: GT-P5220
Reading info, please wait...
Detected phone model: GT-P5220
Firmware compiled date: Wed Feb 26 22:25:44 KST 2014
PDA version: P5220XXUANB6
CSC version: P5220OJVANE1
SW version: P5220XXUANB2
Phone IMEI: 004999010640000
Phone SN: RF1DA6DAY1X
Android version: 4.2.2 (JDQ39)
-----------------------------------------------------------------------------------
Platform: Samsung Android
Selected port: COM148
Selected model: GT-P5220
Selected file: C:\Users\CLINIC PC\Desktop\Cert-GT-P5220-
358263054437944-RF2F31VH1WV.cert
Detected phone model: GT-P5220
Firmware compiled date: Wed Feb 26 22:25:44 KST 2014
PDA version: P5220XXUANB6
CSC version: P5220OJVANE1
SW version: P5220XXUANB2
Phone IMEI: 004999010640000
Phone SN: RF1DA6DAY1X
Android version: 4.2.2 (JDQ39)
Checking Root:
Phone is Rooted.
Checking Certificate file...
Certificate file successfully checked
Writing Certificate...
Executing exploit...
Exploit has been executed successfully
Checking for compatible Certificate and phone...
Certificate is correct
Phone will restart now. Please don't disconnect cable!
Certificate has been written successfully
Please, restart the phone to apply changes


i try to write some certificate from support but nothing change.
so how i can restore the original imei or write certeficate