You might already heard the rumor that T-Mobile was planning some changes to its prepaid mobile offerings and now some documents have leaked, which give us an idea of what to expect.

One of the changes includes bumping the lowest price refill option to $30, which is up from the original $25 refill card. The changes should arrive on Wednesday, October 20th. You can check out the full list of leaked documents if you need more details on the upcoming changes.

In these troubled times, you don’t want a super expensive phone with all the bells and whistles… Okay, you do, but for a moment let’s just pretend. The Disposable Pre-Paid Phone concept is one of the most basic handsets you could hope to find. The idea is that it would be affordable enough for anyone to purchase for use in an emergency situation.

Which makes sense. You would want a portable phone you can wear it around your wrist, for Dick Tracy type emergencies. How billing would work is anybody’s guess. But it looks great in Wii-white. No alphanumeric keypad here, which is lame. Sometimes in an emergency, sending text messages is a good idea.