a730f u4 unknown baseband

hi i have a730f u4 android 9 unknown baseband.
already flash 4 file frimware
but still same

i flash combination u4 still unknown


Chimera Mobile Phone Utility version: 21.14.1245 @ 2019-05-19
Printing phone history


Firmware update started
Unable to detect IMEI number and baseband version. It seems that the modem does not work or the network is unavailable/disabled.
Please reinstall a complete stock firmware and try again!
Model: SM-A730F
Sales Code: unknown
Android Version: 7.1.1 [NMF26X] [SDK 25]
Build Date: Mon Feb 11 17:42:33 KST 2019
PDA Version: FA71_A730FXXU4ASB1
Board Platform: EXYNOS5
Serial Number: RF8JC2A7BCX
Battery Status: 3.90V (51%)
Network Type: GSM
SIM Status: NOT_READY,NOT_READY
Multisim Config: DSDS
Knox Version: v00
Warranty Bit: 0
Security Patch: 2017-08-01
Data Encryption State: unencrypted
Processing firmware...
Switching to download mode.
Waiting for download mode.
Connecting.
Valid PIT file can be found in the firmware: JACKPOT2LTE_EUR_OPEN.pit
Use the Enable PIT Write option if you want to use it.
Reading PIT from phone.
Flashing boot.img
Flashing recovery.img
Flashing system.img
Flashing userdata.img
Flashing sboot.bin
Flashing param.bin
Flashing cm.bin
Flashing modem.bin
Flashing modem_debug.bin
Flashing cache.img
Flashing omr.img
Restarting phone.
Successfully finished.
Finished at local time: [05.19.19 15:31:39]
WorkID: 60066025