KPN, 3 and Play have dropped the data roaming charges between their networks to 25 cents/Megabyte. That's great for their customers roaming in the UK, Germany, Belgium, Poland etc. So how many seconds of VoIP does this buy you? A VoIP stream is between 10 kilobit per second and 90Kb/s. This translates to between 90 and 800 seconds. Given that the price of a roaming call on the mobile network has been set at 49 cents per 60 seconds and receiving at 24 cents/minute, it seems that it is now officially cheaper to use VoIP for mobile roaming!
Put differently: any (VoIP like) stream of 266 Kbit/s or 133 Kbit/s is now cheaper than a GSM call of 9600 bit/s.
There must be a catch here. Telco's are never this afraid of mrs. Reding and this is not a competitive market yet!