Yeah, I put it into airplane mode when I heard Amazon was going to push an update removing some feature. Then just kept using it as I did before using calibre to send books.

Finally decided to jailbreak it and I am glad I did since the custom lockscreens and koreader has been cool.

If you are lazy put your kindle into airplane mode until you find time to jailbreak your kindle. I actually jailbroke it using the previous winterbreak method last week, since I had kept my kindle in airplane mode using calibre.