About unstable network

Have you tried resetting the network settings?
If not, please try this.
Take note that this will also reset any WiFi & Bluetooth connections.

To do this, go to:
Settings/General Management/Reset and then select Reset Network Settings.

Hope this helps.

What phone do you use?

S21ultra 5g

Try following what Dolgogi said, my s21 ultra is working fine after that

Same problem with me as well...5G network connectivity getting dropped off every 2-3 minutes

When I switch from 5G to 4G, it works fine

Yes same here when i switch to 4g its working but on 5g not

Hi @Deepen, thank you for bringing this to our attention. 

I suggest sending an error report via the Samsung Members app for this to be investigated. Error reports are sent to our team to identify any deviations in your device performance, once analysed, our team will get back to you with a response to advise further. 

To send an error report:

Samsung Members > Get help > Error reports > select issue category > describe issue and frequency > Tick ‘send system log data’ > Send in top right.