If your sim card is working before download Lineage OS you simply no need to download baseband/upgrade modem.
1.Need Root device
Example Magisk, SuperSU
2.Need Root File Manager
Example Root Explorer
3.Replace this file
0.How to get working sim card libsec-ril.so ?
-Find Lineage OS previous version that can make your sim card exist in your phone.
-Flash rom to that old version.
-Go to Root/System/Lib/ and backup libsec-ril.so
-Flash rom to new version and go to step 3 to replace file
-Turn Airplane mode on off, if not working reboot.
Or you can use this link to download libsec-ril.so
Im sure file in that link is working for all note3 hlte if not please go to step 0
If you find anyone got problem like this, please help them, spread the solution.
Congrats Lineage OS team, for messed up basic thing in phone.