SM-J600L can not read cert

SM-J600L can not read cert modem not supported
On the U3 bootloader, only this J600LKLU3BSG3 modem is available on which modem to Downgrade or is there a combination ?



Chimera Mobile Phone Utility version: 22.41.1216 @ 2019-09-20
Printing phone history

Read Cert
20.09.2019
12:47:20

Read Cert
20.09.2019
12:07:51

Read certificate started
Gathering phone info...
Collecting information. Be patient! Do NOT disconnect the phone!
Model: SM-J600L
Sales Code: LUC
Country Code: KOREA
Timezone: Asia/Dushanbe
Android Version: 9 [PPR1.180610.011] [SDK 28]
Build Date: Tue Jul 16 14:00:10 KST 2019
PDA Version: J600LKLU3BSG3 [july 2019, rev3]
Phone Version: J600LKLU3BSG3 [july 2019, rev3]
CSC Version: J600LLUC3BSG3 [july 2019, rev3]
Product Code: LUC
HIDSw Version: J600LKLU3BSG3/J600LLUC3BSG3/J600LKLU3BSG3/J600LKLU3BSG3
Board Platform: EXYNOS5
Modem Platform: SHANNON315
Serial Number: RF9K604FGV
Imei: 357168090305768
Unique Number: CBJ003DC7C03355
Connections: AT,MTP
Battery Status: 3.92V (53%)
Network Type: GSM
SIM Status: ABSENT
Multisim Config: SS
Knox Version: v30
Warranty Bit: 0
Security Patch: 2019-07-01
Data Encryption State: encrypted
Reading cert...
Checking modem version.
This modem is not appropriate (J600LKLU3BSG3). Please downgrade if possible!
Unsupported modem version.
Finished at local time: [09.20.19 17:51:37]
WorkID: 73726878