I have 4 of them, and that was mainly just to get lowspeed internet into places that using mobile data was too expensive, and had woosh coverage.
Thinking if its worth complaining to woosh and asking them why they barred these modems, or just saying buggerit and binning the lot of them and moving to voda/tnz/2deg prepaid...
I think i'll go for the latter.
Silly silly way to run a failing company. Kick off the customers who did still want to be on the network.