I have been contacted by 44 1235 644407 offering a 40%dicount is this a cold call

[jimrthomas2dog]

Two numbers have come up on my mobile phone 441235644407 and 441235644412 offering me a 40% discount are they cold calls

[gmarkj]

More than likely @jimrthomas2dog 

We recommend NEVER agreeing to anything if someone has called you - especially if you are not expecting it.

Guide: A Guide to Deal with Spam/Scam Calls and Text 

[jonsie · Accepted solution]

It's a well known scam.
Block the number and do not follow any links.
Forward the scam text or number to 7726 - It's free.

Other ways to report here including Action Fraud website

https://www.o2.co.uk/help/safety-and-security/phishing-and-smishing-advice

How to block a number:

https://www.androidauthority.com/block-phone-number-android-246484/

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