I got call this morning about a free sim card

[LizzieC]

They said they were updating sim cards, and giving a discount on my charges. 

I got suspicious when they asked me to confirm my email address.

Was it right in thinking this was a scam?

[BunnyBoy]

I had this call too. I told the lady "As you called me and my phone is 5g anyway, why would I need this. Add the fact you came up 'Suspected Spam' I'm now not going to believe anything you say'
She hung up! 

[Paddiewack]

Clear attempt at scamming you. Block the number and report it to action fraud.

[clivejo]

Did they ask you to "confirm" any other personal data? name? date of birth? or ask for a code they sent to your phone?

[Paddiewack · Accepted solution]

Highly likely! There’s no need to “update SIM cards” unless they develop a fault. My advice to you is to block the number and report it to Three and action fraud.