All contacts have disappeared from iPhone All contacts have vanished from my iPhone4. Group contacts are all that are visible, and they are Facebook contacts.

I have tried uploading SIM contacts to phone. I have turned off the phone and back on. I have synced to my PC and no contacts visible. I have tried to connect to iCloud and error message reads cannot connect to server. Phone reflects iCloud backup not on. I do not know what else to do.
I would start from a computer and log into iCloud.com and inspect that your account is in good order and add a contact / review what contacts are already stored in the cloud. 

At that point, you can troubleshoot the iOS to iCloud sync in knowing that it isn't a problem with your account itself or a server side error.