How can I delete a single call on my iPhone recents list?
Deleting the entire iPhone calling history is simple, just touch the Clear button in the upper right hand corner. Sometimes you'd rather delete just one phone number from the list.
There's no simple way to do this with the current iPhone firmware. Deleting a single call requires jailbreak apps such as MobileLog or CallD. Alternatively, some programs that run on your computer are capable of deleting single calls on the iPhone (one example is iBackupBot).