On Tue, 13 Dec 2011 05:13:47 -0000, Brian Gaff
wrote:

I believe voda and 02 have some weird thing where a call has to be made
to a
pay number every couple of months or so, or the system swallows the
credit
and stops the sim.
Brian


For Voda I did see somewhere 1 chargeable event every 99 days