d820 eror repair imei (Android version: 5.0)

Welcome to Octoplus/Octopus Box LG Software version 1.7.6

--------------------------------------------------------------------------------

Checking data...OK

Platform: LG Qualcomm

Selected port: COM9

Selected model: D820

Reading info...

Initializing ADB...OK

Waiting for phone...OK

Model ID: Nexus 5

Firmware version:

Kernel version: 3.4.0-g88fbc66

Android version: 5.0

Hardware: ARMv7

After perform Repair IMEI operation, 3G/4G network will be unavailable!

Initializing ADB...OK

Waiting for phone...OK

Switching to Fastboot mode...OK

Unlocking Bootloader...

Bootloader is unlocked.

Writing Bootloader...OK

Please, wait while the phone will turn on and press "Ok" button.

Trying to enable Diagnostics ports...

Initializing ADB...OK

Waiting for phone...OK

Checking root access...

Phone is already rooted.

Diagnostics ports are enbled!

Switching to Serial Port...

Failed!

via Welcome to gsm-tips http://ift.tt/1z2IQ4I