Planning for an 18 year old heading offshore for Uni

[The Ref]

My daughter is about to finish school and will not be spending much time here in future, but I want a good pre-paid phone card that has long expiry and good for those children that are only back for a few months.

Does anyone have any recommendations?

Also with the bank, her account is set against mine as she is a junior. With my son I had trouble getting him an account as there are no bills in his name. Any hints or tips?

Does anyone have any advice on the 2 items above or anything I may be missing for a "Back to Uni in home country" child?

Thanks