how to wipe security / write cert file Sm-N910G

when i try wipe security following error occur







Platform: Samsung Android

Selected port: COM68

Selected model: SM-N910G

ADB server killed.

Detected phone model: SM-N910G

Firmware compiled date: Tue Nov 18 09:54:09 KST 2014

PDA version: N910GDTU1ANK3

CSC version: N910GODD1ANK3

SW version: N910GDTU1ANK3

Phone IMEI: 35xxxxxxxxxxx

Phone SN: R58FB0D202F

Android version: 4.4.4 (KTU84P)

Reading info...

Phone was not found on the selected port!







when i try to wirte cert





Platform: Samsung Android

Selected port: COM68

Selected model: SM-N910G

Selected file: C:\Users\GSM Solution\Desktop\Certificate\SM-N910G

\Cert-SM-N910G_355306065646715.cert

Perform the following steps:

1. Connect phone via UART cable to the Box.

2. Note: phone screen must be active

Connecting to phone, please wait...

Found phone on COM68

Phone connected successfully

Checking Certificate file...

Certificate file successfully checked

Writing new phone IMEI...

Writing Certificate failed



please help me team how wipe security and cert file SM-N940G





Thanking you

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