HTC Droid Eris :: Call History - Unknown Number

Moving on, my problem has to do with "Call-History". What I've noticed is that while I can see the phone-numbers of people in my contacts list people whose number I do not have show up as, bear with me, "Unknown". When I navigate to "Call History", (Say a friend whose number I don't have calls me). I can't add their number to my contact list. This is an increasingly frustrating problem for me. I'll navigate to the "Call History" screen and find that there's no way for me to identify what numerical-phone number called me. There will simply be the designation; "Unknown", while holding down on the entry (while the time/length of the call can be viewed). There is no way to add nor even view, the again, [Unknown] number to my contact list. Phones are ultimately communication devices, if I can't find a solution, well, I'm convinced that I'm going to have to down-grade from a smart-phone to something capable of recording and adding unknown numbers.