iPhone 2g very slow ! Please help !?

I have an iPhone 2g and because I couldn't update it, I downloaded whited00r 6 to get a feel of iOS 6. But after downloading it, my iPhone has suddenly become very slow. By very slow, I mean VERRYY Slow. It is of 4 GB and approx. 2GB was left. I have already downloaded many cleaners from Cydia. Yesterday I downloaded some songs so now approx. 1.88 GB is left. Please help me. Thnks in advance :)