Saludos!
Igualmente me paso lo mismo...
Usuario: zsc_cTUQ9fdU
Checking Login and Password... OK
Balance: 20 crd.
You have 20 credit(s) left. This operation takes 6 credits. Continue? Yes
Waiting ADB device... OK
Reading phone info...
Model: SM-N960U
Android version: 10
PDA version: N960USQS9FUF1
CSC version: N960UOYN9FUF1
Phone version: N960USQS9FUF1
Product code: SM2N960UZBATMB
CSC country code: USA
CSC sales code: TMB
Carrier ID: TMB
Phone SN: RF8KA1DEJBZ
IMEI: 358621092362236
HW version: REV1.1
RF cal date: 2018.10.11
Chip name: SDM845
Modem board: SDM845
Security patch: 2021-07-01
Boot Warranty bit: 0
SIM State: ABSENT
Rebooting phone... OK
Waiting ADB device... OK
Rebooting phone... OK
Waiting ADB device... OK
Waiting for device to become ready... OK
Initialization zTool... OK
Running zTool, please wait... OK
Trying to enable diag port... OK
Waiting ADB device... OK
Waiting for device to become ready... OK
Searching Samsung diag port... detected COM30
Reading IMEI... OK
Initialization zTool Loader... OK
Running zTool, please wait... OK
Loading... OK
Initialization zTool... OK
Running zTool, please wait... OK
Reading data from phone... OK
Searching Ramdump interface... COM46 detected
Reading data from phone... OK
Calculating... OK
Searching server... OK
Waiting for server answer... OK
Waiting ADB device... OK
Waiting for device to become ready... OK
Initialization zTool Loader... OK
Running zTool, please wait... OK
Loading... OK
Initialization zTool... OK
Running zTool, please wait... error (1 )
Retry 1...
Initialization zTool Loader... OK
Running zTool, please wait... OK
Loading... OK
Initialization zTool... OK
Running zTool, please wait... OK
Reading data from phone... error (4.7.-2)
Retry 2...
Initialization zTool Loader... OK
Running zTool, please wait... OK
Loading... OK
Initialization zTool... OK
Running zTool, please wait... OK
Reading data from phone... error (4.7.-2)
Retry 3...
Initialization zTool Loader... OK
Running zTool, please wait... OK
Loading... OK
Initialization zTool... OK
Running zTool, please wait... OK
Reading data from phone... error (4.7.-2)
Retry 4...
Initialization zTool Loader... OK
Running zTool, please wait... OK
Loading... OK
Initialization zTool... OK
Running zTool, please wait... OK
Reading data from phone... error (4.7.-2)
Retry 5...
Initialization zTool Loader... OK
Running zTool, please wait... OK
Loading... OK
Initialization zTool... OK
Running zTool, please wait... OK
Reading data from phone... error (4.7.-2)
Retry 6...
Initialization zTool Loader... OK
Running zTool, please wait... OK
Loading... OK
Initialization zTool... OK
Running zTool, please wait... OK
Reading data from phone... error (4.7.-2)
Retry 7...
Initialization zTool Loader... OK
Running zTool, please wait... OK
Loading... OK
Initialization zTool... OK
Running zTool, please wait... OK
Reading data from phone... error (4.7.-2)
Retry 8...
Initialization zTool Loader... OK
Running zTool, please wait... OK
Loading... OK
Initialization zTool... OK
Running zTool, please wait... OK
Reading data from phone... error (4.7.-2)
Retry 9...
Initialization zTool Loader... OK
Running zTool, please wait... OK
Loading... OK
Initialization zTool... OK
Running zTool, please wait... OK
Reading data from phone... error (4.7.-2)
Retry 10...
Initialization zTool Loader... OK
Running zTool, please wait... OK
Loading... OK
Initialization zTool... OK
Running zTool, please wait... OK
Reading data from phone... error (4.7.-2)