Sim card not being recognized

[Craftygirl72]

My cell keeps saying i need a sim card so I got 1 and just popped up again that I need a sim card 

[meself]

Is the phone new or not activated

[Craftygirl72]

It's active had it for about 5 years

[meself]

Hmm maybe need to replace the Sim card or perhaps you didn't use it for some time

[Craftygirl72]

Nope got a new 1 today

[meself]

Trying to think why it would be asking for Sim card

[mls613]

Call your internet/cell carrier ask for troubleshooting dept. They may tell you to have another cell by you so they can talk you through steps. I had to have a friend and their cell so i could take care of the trounleshooting

[Craftygirl72]

I just went there today and got a new som card

[meself]

Samsung phone may ask for a SIM card for a number of reasons, including: 

SIM card not inserted: The SIM card may not be inserted properly or securely.

Damaged SIM card: The SIM card may be damaged.

Software glitch: There may be a software glitch on the phone.

Network settings: There may be an issue with the phone's network settings.

Here are some things you can try if your Samsung phone is asking for a SIM card:

Restart your phone: Restarting your phone may resolve the issue. 

Check the SIM card: Remove the SIM card and check for dust or other particles that may be interfering with it. Reinsert the SIM card so it's properly seated. 

Reset mobile network settings: Resetting your phone's mobile network settings may help. 

Try another phone: Insert the SIM card into another phone to see if it's detected. 

A SIM card is a vital part of a Samsung phone, as it allows you to access the network and authenticate you. Without a SIM card, you can only use your phone's Wi-Fi to browse the web, access social media, and stream video. To make calls, send messages, and access cellular data, you'll need a SIM card and a data plan. 

[Heff101]

I did all of that also but still telling me to insert sin card, but very random. S21