Help Samsung galaxy s10+ not Service state : out of service after flashing stock firmware with Odin

[Chatz102]

I got a rooted Samsung galaxy s10+ and went on to unroot it and flash stock firmware using Odin. After flashing, when I insert my simcards, it is able to identify the simcard providers but when I try to make calls, it says not registered on network. When I go to setting and simcard status it says the following:

Network: Emergency calls only
Mobile network state: Disconnected
Service state: out of service
Mobile voice network type: UMTS

How do I fix this? Please help

 

[mikedt]

Is the IMEI and/or MEID showing blank or invalid as well? I suspect you flashed an incorrect or faulty ROM for your S10+ version, and it's hosed the baseband. To fix you'd have to flash the correct stock firmware file for your particular S10+ variant.