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como lo soluciono?
BACKUP INSTRUCTIONS:
Phone must be rooted!
If the software can't root the phone automatically,
then you must root your device manually.
1. Power on the phone.
2. Tap 7 times on 'Build number' in 'Settings'-'About phone'-'Software information'
to enable 'Developer options',
go to 'Settings'-'Developer options' and enable 'USB debugging'.
3. Connect the phone to PC with USB cable, install drivers if needed.
4. Select device in ADB settings.
5. Press 'Read EFS' button to read backup or 'Write EFS' to restore.

To backup/restore QCN, phone diagnostic port must be enabled.
1. Power on the phone.
2. Type *#0808# and select 'DM+MODEM+ADB'.
3. Connect the phone to PC with USB cable, install drivers if needed.
4. Select diagnostic port in port settings.
5. Press 'Read QCN' button to read NV backup or 'Write QCN' to restore.

Operation: Read CERT
Selected model: SM-J400M
Software version: 41.10

Waiting ADB device... OK
Reading phone info...
Model: SM-J400M
Android version: 9
PDA version: J400MUBU4BSG3
CSC version: J400MOWO4BSG3
Phone version: J400MUBU4BSG3
Product code: SM-J400MZVKBVO
CSC country code: Bolivia
CSC sales code: BVO
Carrier ID: BVO
Phone SN: R28K92QRKLD
IMEI: 357475094520007
HW version: MP 0.300
RF cal date: 20180928
Chip name: EXYNOS7570
Modem board: SHANNON305
Security patch: 2019-07-01
Boot Warranty bit: 1
SIM State: LOADED,LOADED
Initialization zTool... OK
Running zTool, please wait... OK
Reading data from phone... OK
Searching server... OK
Checking server answer... modem not supported
Searching server... OK
Checking available files... not found compatible file
Try downgrade modem if possible.

Done with Samsung Tool PRO v.41.10
in Samsung Tool by (2.7k points)

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