My son’s phone text message charges are really getting higher day by day. My son is using a plan to for text message in which he gets 250 messages for five dollars per month. But now he is exceeding that mark. I will not get him 10 dollars unlimited text message plan. I have turned off text messaging on his phone. But now he is using AIM that charges you just like text message. I would like to disable his access to any mobile instant messaging services. What can I do to disable mobile instant messaging such as AIM? I would really appreciate if someone can help me regarding this. Thanks.