Can't call abroad (number not recognised)

[DaveyQueen]

I've been trying to call someone in the US for a while now, I've triple checked with them that the number is correct, I've made sure the + and everything is how it should be but O2 keeps telling me the number is not recognised. They can call me just fine but I cannot call back, I even got them to call me so I could call the same number back but it just won't work. I'm on pay monthly if that helps in any way

[Bambino]

@DaveyQueen Just asking to double check, are you entering +1, 3-digit area code, 7-digit number?

You can also try 001, 3-digit area code, 7-digit number.

Those are the only two ways to call a US number.

Edit: If you and the person you're calling both have WhatsApp you can call using the app over WiFi for free.

[MI5]

@DaveyQueen 

Do you have a spend cap?

Guide: Spend Caps & Charge to Mobile on O2 

We’re just customers like you but it sounds like you’ll need someone to access your account which can’t be done from here. If you message O2 on Facebook (https://o2uk.co/O2CFB) , Twitter (https://o2uk.co/O2CTW) or Instagram (https://o2uk.co/O2CIG) , they should be able to help you with this
Thanks