The reason... Did you know that Verizon charges you regular airtime minutes for calling your voicemail, customer service and the payment system from your mobile phone? It's not considered IN-Network calling, even though you're calling their help lines. Often times, these minutes can cause regular plan overage, at the rate of $.40 per minute!
That could result in millions earned every month on the backs of responsible plan users who never would have known! Arg!
So, if you're a class action lawyer, or know of a good one, let me know!