This will be interested for Slovenian readers. Recently I switched the mobile plan from Mobitel to T-2. T-2 has an UMTS data coverage in major Slovenian cities for only 10 EUR/month. They provide unmetered data plan through their nodes. When being out of reach their voice signal is being transmitted through Mobitel. They also have cheaper peering for establishing calls to Si.mobil and Tuš mobile, than Mobitel.