If I was to transfer my number from a standard O2 SIM card to an online O2 SIM (from the free SIM card promotion), would I be on the online tariff (with 300 free txts) or the standard tariff?

depends which tariff you want to be on, you will have to contact o2 to transfer the number to the new sim, you coukd then ask to be on either tariff.

Hope this helps

Dinger

As standard you will be on the 'O2 Online Talk Alot' tariff.

The free SIM is an O2 online one. Although they are the same company O2 treat their Online and Offline services as different airtime providers and as such you can't change directly between online and offline tariffs on the same SIM. Thats how it used to be anyway, I don't think it has changed.

You can however change to the 'O2 online Original' tariff, which also comes with 300 text messages, but has different call charges.