*YouGov, Dec 2020. 179/212 (84%) O2 business customers
Data Rollover: For new or upgrading customers only. Available on selected tariffs of 6GB of data or above, excluding 2GB triple data, 3GB double data and unlimited data tariffs. Up to 100% of unused data from standard monthly data allowance can be rolled over into the following month. Eligible data rolls over for one month only. Any data that cannot be rolled over will expire. Any unused data will not rollover if you decide to change to an alternative tariff.
Flexible Tariffs: For new and upgrading customers only. For Small Biz tariffs, tariff can be changed to a non-promotional tariff of the same type that has either a lower, higher or the same amount of data as tariff selected at commencement. For Small Biz Sim Only, Small Biz Data Only and Mobile Broadband Sim Only tariffs, tariff can be changed to a non-promotional tariff of the same type with either the same or a higher amount of data as tariff selected at commencement. A change in tariff can be made 30 days from the date of connection or upgrade, each billing month.