iPhone 4S no cydia??

you would have to check to see what version you have if its 5.0.1 or 5.1 , if its 5.0.1 you can then re jailbreak it and you would then have Cydia reinstalled.

You can reinstall Cydia vis SSH (IF ENABLED PREVIOUSLY!) or simply use the free program called iExplorer

1. Download the Cydia package – available from many sources across the web these days. (as .deb package)
2. Use CyberDuck (SSH), WinSCP (SSH) or iExplorer to transfer the files into your iPhone to the ROOT folder
3. Once you have placed the .deb package into the ROOT folder, open up the Mobile Terminal and type the following commands:
- dpkg -i /Cydia.deb
- killall -HUP SpringBoard

there maybe a problem though if you do not have mobile terminal installed or SSH access since you cannot run commands manually.

Youre sure it's not docked?

Open sbsettings and click dock.
See if it's in there by any chance.

this link might help I have never tried it though op http://www.spiritjb.org/2011/12/update-install-cydia-1.1.3-without-redsn0w-0.9.10b2.html and your situation is a tad different.

That sucks.

guessing the guy you bought it from used cydelete to remove cydia or something like that. we have people come on here asking how do I delete cydia I never understand why. since at the very least it this makes getting updates much easier.

In SBsettings/more/Hide Icons did you check and see if maybe cydia is hidden?

try Cyder to install Mobile Terminal?

then use mobile terminal to run commands:
- dpkg -i /Cydia.deb
- killall -HUP SpringBoard

that should launch the cyda installer you put into your root folder...

Do not re-run the jailbreak using cinject. I was personally warned against it by iH8snow himself. It will *not* work and will force you to do a DFU restore.

Do you have MobileTerminal or SSH?

If you can connect to the phone using iFunBox, you should be able to install MobileTerminal. All you have to do is download it from here, unzip it on your computer, then drag the Terminal.app folder to the /var/stash/Applications.XXXXX folder. Reboot and you should have MobileTerminal on your springboard.

Now, download Cydia Installer here. Use iFunBox to drop it in the root folder /. Then open MobileTerminal and enter the following command:


As long as dpkg is still installed, this should install Cydia.

Hmm. Well, that's progress. It's possible that you don't have all the required dependencies. Did it give you any sort of error message during the install?