I have the i850 Nextel phone, and it used to work fine, but now all of a sudden I've been having this problem.

My messages inbox is empty, but when I send/receive a text message it says 'Memory Low, Delete Messages'. But my inbox and sent items box are both completely empty..?

Same thing happens when I try to take a picture it says 'Memory Low, Delete Media'. But my Media Center is empty and has no pictures, a few ringtones, but not even close to enough to burn much memory.

Anyone know what I can do to fix this problem, BESIDES taking it to a Nextel dealer, because I'm getting the i860 from a friend and I want to get that phone fixed once I get it, but I'd still like to get the i850 working properly.