> The Mobal product is very interesting, and I'm not sure I understand their
> business model.
Neither do I, and I have one of their SIMs. ;-)
> They seem to be a reseller of O2 (BT Cellnet) services, but with a unique
> billing plan which has nothing whatsoever to do with anything that O2
> sells under its own brand in the UK.
Right, they are some sort of O2 service provider.
> You pay $19 for the O2 SIM, which is charged to a major credit card,
> and then .... potentially .... nothing ever again.
They do say that if you don't use it every N (9?) months they may close your
account.
> If (and only if) you use the SIM to make calls, you are charged (up to)
> multi-dollar international roaming rates like the prepaid international
> roaming SIMs many of us know. For a little additional money you can add
> GPRS service. Voice mail that can be toggled on/off is available too.
Check. Having the GPRS activated was free for me and I have not yet actually
received any bill for the tiny usage I've made of it. They were very hard
pressed to explain exactly how GPRS would be charged and I'm waiting to see
if I get some monster bill for just 2kB, or so. Also, outgoing SMS is very
spendy BUT you can use the GPRS with smsBug. ;-)
Incoming SMS is free and O2's M-mail seems to work perfectly.
> You are no obligation to actually =use= the card in order to retain your
> account and UK phone number, but they may temporarily bar the number after
> 18 months of inactivity as a safety precaution.
> For occasional, emergency use before buying a local prepaid SIM in another
> country, it looks ideal. It has all the flexibility of an international
[quoted text clipped - 4 lines]
> What's the catch? Further ... how exactly do they make money on low-usage
> subscribers?
It's a mystery to me. I just have it as a backup in case my other options
don't work.

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Donald Newcomb
DRNewcomb (at) attglobal (dot) net