Unknown calls saying O2

[Lindamac8854]

I have had about 10 calls today from 020 8187 6020 saying my sim will stop soon , but since there is no reason for this to happen is this spam as I suspect??

[Bambino]

@Lindamac8854 It's a well known scam
Block the number and report it free to 7726.
Don’t open any links or enter any information.
O2 advice here:

https://www.o2.co.uk/help/safety-and-security/phishing-and-smishing-advice
https://www.o2.co.uk/help/safety-and-security/unwanted-calls-and-messages
https://www.actionfraud.police.uk/

How to block a number:

https://www.samsung.com/us/support/answer/ANS00062352/

https://support.apple.com/en-us/HT201229