Got problem with new SIM only

[Boab]

Got a new SIM only deal but when I put it into my unlocked phone I get ‘No Service’ message.

What do I do to get the SIM working?

Thanks

[jonsie]

Have you activated the sim?

Is it a sim swap you have done?

Where did you get the phone from?

[MI5]

@Boab 

The sim should be activated already if it's a new simo account.

Where did you get it from?

[Boab]

Thanks for the reply.

How do I register it? I had a giffgaff SIM in previously and that runs on the O2 network so I know it’s compatible. Really stuck here.

[Boab]

I got the sim from O2 telesales.

[MI5 · Accepted solution]

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@Boab wrote:
I got the sim from O2 telesales.

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Logically it would suggest the sim is faulty but on the off chance they have sent it out un activated, give customer service a call to check Guide: How to find help & contact O2 

[Boab]

Thanks 🙏