problem to repair imei I9505 V4.4.2
 

Welcome to Octoplus/Octopus Box Samsung software version
1.5.3
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To connect GT-I9505 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. Go to dial window.
11. Enter "*#9090#" number.
12. Set "Diag config" to "USB" value.
13. Restart phone.
14. Press "Read Info" in software.
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Platform: Samsung Android
Selected port: COM2217
Selected model: GT-I9505
Mode: Normal
Phone model: GT-I9505
Firmware compiled date: Dec 24 2013
Firmware compiled time: 00:00:00
Firmware released date: Feb 13 2014
Firmware released time: 21:32:10
SW version: M9615A-CEFWTAZM-4.0.17135
Old IMEI: 004400-15-202000-0
New IMEI: 352990-06-278094-1
Creating NVM backup
Reading NVM done!
Firmware compiled date: Thu Feb 13 20:47:45 KST 2014
PDA version: I9505XXUFNB8
CSC version: I9505VFGFNB3
SW version: I9505XXUFNB8
Phone IMEI: Unknown
Phone SN: RF1D78K4CZF
Android version: 4.4.2 (KOT49H)
Cheking Root
Reading security backup, please wait...
Backup saved as C:\Program Files (x86)\Octoplus
\Octoplus_Samsung\BACKUP\Security-GT-I9505-28-04-2014_17-
01-35-.asec file
Erasing old IMEI. It can take some time. Please wait...
Phone will restart now. Please don't disconnect cable!
Firmware compiled date: Dec 24 2013
Firmware compiled time: 00:00:00
Firmware released date: Feb 13 2014
Firmware released time: 21:32:10
SW version: M9615A-CEFWTAZM-4.0.17135
Found phone on COM2217
Repairing NVM for GT-I9505 phone...
Write IMEI failed
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Platform: Samsung Android
Selected port: COM2217
Selected model: GT-I9505
Detected phone model: GT-I9505
Firmware compiled date: Thu Feb 13 20:47:45 KST 2014
PDA version: I9505XXUFNB8
CSC version: I9505VFGFNB3
SW version: I9505XXUFNB8
Phone IMEI: Unknown
Phone SN: RF1D78K4CZF
Android version: 4.4.2 (KOT49H)
Writing security backup, please wait...
Phone will restart now
-----------------------------------------------------------------------------
Platform: Samsung Android
Selected port: COM2217
Selected model: GT-I9505
Mode: Normal
Phone model: GT-I9505
Firmware compiled date: Dec 24 2013
Firmware compiled time: 00:00:00
Firmware released date: Feb 13 2014
Firmware released time: 21:32:10
SW version: M9615A-CEFWTAZM-4.0.17135
Old IMEI: 004400-15-202000-0
New IMEI: 352990-06-278094-1
Creating NVM backup
Reading NVM done!
Firmware compiled date: Thu Feb 13 20:47:45 KST 2014
PDA version: I9505XXUFNB8
CSC version: I9505VFGFNB3
SW version: I9505XXUFNB8
Phone IMEI: Unknown
Phone SN: RF1D78K4CZF
Android version: 4.4.2 (KOT49H)
Cheking Root
Reading security backup, please wait...
Backup saved as C:\Program Files (x86)\Octoplus
\Octoplus_Samsung\BACKUP\Security-GT-I9505-28-04-2014_17-
07-00-.asec file
Erasing old IMEI. It can take some time. Please wait...
Phone will restart now. Please don't disconnect cable!
Firmware compiled date: Dec 24 2013
Firmware compiled time: 00:00:00
Firmware released date: Feb 13 2014
Firmware released time: 21:32:10
SW version: M9615A-CEFWTAZM-4.0.17135
Found phone on COM2217
Repairing NVM for GT-I9505 phone...
Write IMEI failed

Hello.
Please make Repair NVM and post here software log.