You can choose from around 250 countries, using the drop down list provided. If you find that you are not receiving the confirmation code this maybe due to a network issue which could be local or due to wider reaching issues such as roaming agreements etc... In order to get around these issues you can always set up the Digidentity app as an authenticator which will provide you with the confirmation codes automatically.
If you do not have a mobile number from any of these countries, it is possible to skip this stage by clicking the link stating that you cannot confirm your mobile number.
In that case, as you do need to add two-factor authentication at this stage (setting up login codes), we advise you to then try our alternative method of generating the codes. This is again via our Digidentity authenticator app. The app is simply called 'Digidentity' and is compatible with most smart phones or tablets. It can be downloaded from the app store on your device.