Of course Trøndermobil has data rollover!
If you haven't used up all your data, the unused data is carried over to the next month, completely automatically. You can't roll over more data than is included in your subscription. If you have a 20 GB subscription, you can't roll over more than 20 GB.
Data rollover is included in all our Trøndermobil subscriptions, except Fri data and Fri data+
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