I just Recently Jailbreak my iphone 4s ( ios7.4 ) via Evasion7. The problems i am facing is Application Crash. My Safari Calculator and Mail App crashes even before its been opened. I saw a video which can resolve this problem, and that's by Deleting some file through Ifile. but i cant download Iifile from cydia, i get an error saying "NetDB:Open nodename nor servname provided, or not known". Can anyone of you help me out with these problems.