Thanks, well keeping it in Airplane mode is out - I still want to send/receive calls and text.
I all honesty I don't see how you want go over...I would be so paranoid . I use 2gb or so a month and I use wifi around 65% of the time
The latest ain't always the greatest!
It's almost impossible. However, with Mobile Data turned off (like I told you how to do) you can still send and receive calls -- you just have no data connection without WiFi.
Texting is handled via CDMA rather than EVDO rev A (3G), so it will still get your texts.
If you have access to a WiFi network you can turn WiFi on and still use data without going against your monthly quota.
And kill that task killer. Task killers are BAD with a capital HORRIBLE!