a5y17lte SIM card not detected

[kikibaby]

Purchased two new Samsung Galaxy A5 (SM-A520F) mobiles and after flashing with Lineageos a5y17lte
the SIM card is no longer detected in either device.

(I am sorry if this is the wrong area for this issue)

[sputnick-dev]

Wich version of LineageOS did you install and wich version of stock ROM did you have ? Please edit your post with details. Do you make Nandroid backups at each steps ? You should.

This has already been addressed in XDA. User has incorrect baseband and trying to install Nougat over Oreo or vice versa