Some customers have already received letters about the data breach but as it is the weekend are simply left anxiously waiting until after the weekend when they can discuss with the company.
The type of information which has been harvested in the cyber-attack is names, addresses, dates of birth and bank details; all the type of information that can lead to identity theft, debt being racked up in your name and more.
In a statement Carphone Warehouse said "Up to 90,000 customers may also have had their encrypted credit card details accessed."
To add to any confusion Carphone Warehouse has sub-divisions.
These were hit in the cyber-attack but many Carphone Warehouse customers are unaffected. The company owner, Dixons, has apologised to customers for the security breach.
It looks like divisions of the company, including the OneStopPhoneShop.com, e2save.com and Mobiles.co.uk websites, took the brunt of the cyber-attack.
480,000 Talk Talk Mobile customers are also affected by this breach.
BBC News has some simple but essential advice for affected customers;
Just when the cyber-attack began is not clear with some reports that it happened within the two weeks running up to last Wednesday.
And it may not be a uniquely British problem as "Dixons Carphone operates in about a dozen European countries including Britain, Ireland and Germany."
Customers who want to check their credit rating will have to pay the usual fee.
So we wonder just what remuneration Carphone Warehouse will give those affected?