framework not found in iPhone

Due to miscellaneous reasons those frameworks which were appearing in your library, now when you open up your project it doesn't show you and instead appears in red letters framework name.

First check your XCode app framework directory : would be in such path

Applications/Xcode2.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk/System/Library/Frameworks

if you can't see it there then open up your system library : would be in such path

System/Library/Frameworks

if you find your framework required there then just copy it and paste it to the above framework directory and issue will be resolved.