I do not use voicemail but find myself occasionally hitting the voicemail button my accident. the phone is on a prepaid plan, so I get charged for every outgoing call including voicemail access. I searched around and found that it is possible to disable/remove the voicemail button in the built-in phone app in IOS 4, or by jail breaking and using the voicemailblock app. However, I do not want to jailbreak and am using ios 6.0.1 on my 4s. would I still be able to disable/remove the voicemail button, or re-assigned the voicemail to a different number?