Answer to: Sim card tray holder Replacement?You can check http://trait-tech.com/catalog/IpodIphoneAccessories/i.... I think they have what you need. I have personally order some parts from them and they are quite reliable.
Answer to: sad iPhone crash won't exit safe modeSad iPhone normally caused by unstable package from cydia. Try to delete the package 1 by 1 until you found package that cause the safe mode. Reinstall the unaffected packages back to cydia.
Answer to: A part fell off when I replaced the dock connector...this piece is holding the camera