sm-b350e unlock failed

Welcome to Octoplus/Octopus Box Samsung software version 2.2.1
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Platform: Samsung Spreadtrum
Selected port: COM1
Selected model: SM-B350E
Selected port: USB
To connect SM-B350E phone perform the following steps:
1. Disconnect phone battery.
2. Press and hold "1" button, connect USB cable.
3. Connect battery.
Connecting…
Phone found.
Sending preloader…
Preloader send successfully
Sending mainloader…
Mainloader send successfully
Unlocking phone. This can take some time. Please wait…
Unlocking phone…
Reading NV section section…
Backup saved as C:\Program Files\Octoplus\Octoplus_Samsung
\BACKUP\Security-SM-B350E_27-02-2016_12-59-14-.nv file
Phone unlocking failed
Performed by 2.2.1 software version
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Platform: Samsung Spreadtrum
Selected port: COM1
Selected model: SM-B350E
Selected port: USB
To connect SM-B350E phone perform the following steps:
1. Disconnect phone battery.
2. Press and hold "1" button, connect USB cable.
3. Connect battery.
Connecting…
Phone found.
Sending preloader…
Preloader send successfully
Sending mainloader…
Mainloader send successfully
Reading phone unlock codes. It can take some time, please wait…
Backup saved as C:\Program Files\Octoplus\Octoplus_Samsung
\BACKUP\Security-SM-B350E_27-02-2016_13-00-00-.nv file
Calculating codes. Please wait…
Can’t find NCK code!
Can’t find NSCK code!
Can’t find SPCK code!
Can’t find CPCK code!
Can’t find SIM code!
Work time: 0:02:51
Performed by 2.2.1 software version
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