Hey SD54672,
Welcome back to the community and thanks for taking the time to post.
We no longer offer the ultimate oomph sim any longer and this would be replaced with an O2 sim card, if you sign up to a Volt offer with us, this would be replaced by an O2 sim card. You can find more information about the deals that we offer for this here, it will show information about the products and the latest deals that we have available.
If you don't pick a Volt package, you can keep the sim card but this would be a chargeable sim.
Kind Regards,
Steven_L