Steps to install Cydia:
1. Use IE browser to open cydia official download address: http://apt.saurik.com/cydia/debs/. Note: It is said that the official website address of Cydia Some browsers are not open, or IE is more general versatility.
2. In IE browser interface, click "Edit"-"Find on this page", the search box will appear, enter "Cydia-lproj".
3. The latest Cydia installation package is the 1.1.8.1 version, but will be updated later, to select the date from the most recent installation package, and then click on the link to download the Deb file to the local.
4. Connect the iphone5 to the computer, through the PP Assistant or 91 assistants and other tools to upload the file just downloaded to the "var" directory under the/root/media/cydia/autoinstall/folder.
5. After uploading the files, you also need to restart the iphone5, after the first reboot, "Cydia" began to install, when the installation is completed, restart Iphone5,cydia will be installed successfully.