Swisscom Natel Easy for BBs?

[bbadam]

Hi!

I have a Blackberry in the UK on O2 but finding increasingly I'm spending more time in Switzerland, not a resident though.

I've got a Swisscom Natel Easy sim (which is their PAYG plan) in a fairly regular Sony Ericsson handset but I'm finding my BB's data charges are really starting to stack up while I'm out there, because O2's plan doesn't cover it.

I'm not their enough to justify an 18 month contract (and I think I'd struggle anyway - not being a resident) so does anyone know of a data "bolt on" for Swisscom's PAYG service? Or any of the other carriers out there?

There are standard PAYG data tarrifs but at around CHF10 per MB I'd be better off just paying O2's roaming price!

Any advice greatfully received,
Thanks
Adam