I have an LG Ally. I cancelled my plan in November, I think, but for like 2 months even though I couldn't surf the internet with my data plan, I could still turn on wifi and use that. But all of the sudden, it said it was "unable to scan for networks" and when I looked at my MAC address, it said it was unavailable. Is it because I cancelled it? Is there any way to fix this? Thank you!