Most of our data SIMs come with an allocated amount of data and can’t be topped up.
Countries where you cannot top up a data SIM include Canada, Japan, Spain, US, Denmark, Hong Kong, Ireland, Italy, Austria and Sweden.
We recommend instead that you purchase multiple data SIMs for these destinations, if you think you will need more than the data amount provided.
For other countries, contact us at support@holidayphone.com and we’ll do our best to help.