Just thought I would bring this to people's attention as it may have slipped under a few radars (incl my own). Long time vodafone customer. Have my account set up for roaming for many years. I've always turned my data off and only used it for occasional txt etc so not big use when away (I'm on holiday so don't deal with work while away).
Vodafone introduced the $5 roaming. Looked at it briefly but have never felt it was worth it when I use an optus $2 sim if I need data etc in Australia. Recent holiday I was just using hotel wifi so didn't change sims. Sent a few txt, checked voicemail twice and made one call. All up over one week 4 x txt, voicemail 3:25 mins and 2:37 calls. Figured I would get charged individually for each. However it seems that you are automatically enrolled in the $5 if you are on account (and its not opt in). The first action triggers the $5 charge (so it is not cumulative to a maximum $5 but starts at the beginning). So I have now spent a total of $30 for the above amount. Rang vodafone, there is no opt out unless you cancel roaming. The solution seems to be not to use your phone overseas which kind of makes my phone is essentially useless for roaming.
I can see how it would be great for power users (or idiots that don't work out what data is) but for me it is now a complete pain in the ass! It is unfortunately a deal breaker after almost 15 years with vodafone as I go away regularly enough where this will end up costing me a small fortune. Sometimes a little flexibility would go a looong way!
Hope no one else has been caught out with this or realises before a big bill.
Cheers (and rant over)