| | Re: 8520 uses EDGE even when wifi is active
Turning off the Mobile Network IS the correct thing to do to force the device to ONLY use the WiFi connection. Leave Data Services on.
You will get use of all data, but no phone calls.
What you're doing, without the BlackBerry Data Plan on your account is a gamble, as the device was meant to use data. Without a plan, you're gambling.