Is this a scam?

[dennoquellovero]

I got a message saying:
"O2: Your recent bill was NOT paid. To avoid any fees and continue using your allowances as normal please visit: my-o2-billingservice .com"
From this number: 07538 503218

[Bambino]

@dennoquellovero 

O2 don't send messages like that by text.

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.actionfraud.police.uk/

How to block a number:

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

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