Samsung g570f unlock error solved with downgrade modem file 100000% ok by Songram Telecom

Samsung G570f unlocking is not possible in new security build with root or without root,you have to downgrade modem file to perform unlock operation in new security phones..

g570f unlock error

Waiting ADB device... Ok

Reading phone info...

Model: SM-G570F

Android version: 6.0.1

Product code: SM-G570FZDDKSA

Phone version: G570FXXU1APL1

PDA version: G570FXXU1APIB

CSC version:

CSC country code:

CSC sales code:

HW version: MP 0.500

Phone SN: R28HB03L1TK

Chip name: EXYNOS7570

Modem board: SHANNON305

RF cal date: 20161101

IMEI:

Checking Super user right... true

Reading NV data... Ok

Checking NV data... Ok

Initialization zTool... Ok Waiting ADB device... Ok

Reading phone info...

Model: SM-G570F

Android version: 6.0.1

Product code: SM-G570FZDDKSA

Phone version: G570FXXU1APL1

PDA version: G570FXXU1APIB

CSC version:

CSC country code:

CSC sales code:

HW version: MP 0.500

Phone SN: R28HB03L1TK

Chip name: EXYNOS7570

Modem board: SHANNON305

RF cal date: 20161101

IMEI:

Checking Super user right... true

Running zTool, please wait...

Start... Ok

Initialization... Ok

Generate and check client proof... Ok

Verify proof by client... Ok

Reading data from phone... error (0)

Try downgrade modem if possible

Done with Samsung Tool PRO v.28.6

To unlock phone first flash with this Modem file to downgrade build

Root g570f with this file tested on 6.0.1