Keypad pops up "Voicemail" is the one identified as the one being called and I get prompt "Please enter your password" with a keypad interface like this
When I push the recent button I can see "all" calls sent and received and "missed" calls
Similar to this image http://0.tqn.com/d/ipod/1/0/O/3/-/-/iphone_gallery_8.jpg
Not a Voicemail list interface like this
Voicemail with keypad interface- Yes
Visual Voicemail - No
If anyone buys any used device privately or online from eBay or anywhere else, be sure to make certian that "find my iPhone" has been disabled by the previous owner. If the device is running iOS 7, has find my iPhone enabled, and you cannot get in touch with the previous owner, you will not be able to activate and use that device, ever.
If you have any doubts that iOS 7's Activation Lock may not have been disabled by the seller, then do NOT buy the phone. These forums are littered with posts from unfortunate people who naively purchased a used iOS 7 device, only to find out they cannot get in touch with the previous owner, and they have just purchased an expensive door stop.