Originally Posted by dc/dc
You should consider uninstalling all apps and re-installing one by one to see which is using your data. It's impossible for your device to use any data whilst it's off. Opera really won't help you all that much as BlackBerry devices compress data anyway.
Thanks for the advice, I've uninstalled all the apps and it doesn't seem to be making any difference. I'm still losing a lot of data even when I'm not using the phone. Posted via BlackBerryForums.com Mobile