@HappyNES No, it's not limited to days, you have (if you have the appropriate subscription) 40 GB / high speed per month, if that lasts you until the end of the month, that's ok, on the 1st of the next month it starts again with 40 GB. If you use up the 40GB within a month, there is still roaming, but significantly slower. However, you can then book additional packages if necessary, this can be done in Cockpit.