I keep running into this issue. First of all, I live in a very good service area, so it's not lack of a strong signal that causes this. I'll be using the web browser and suddenly a page won't load and I look up to notice my 3G icon is gone! It usually takes turning off/on the phone to get it back. It's super annoying and I was wondering if anyone else ever experiences this and if so, is there anything that can be done to fix it?