The Art of Getting Into Buildings, or Why Buzzers Suck

So there's a buzzer to get to into my building that lights up whenever someone walks into the door. The key goal is to allow someone to look up a resident to be allowed to enter the building; this in turn provides a sense of security for the residents. 

 

The way that it works is this - someone uses the screen to look up a resident by name or can dial the number directly if they know it. They then dial the number and the camera to the left activates to capture their face - this ties to the security system in the apartment where the person can see who's trying to call them.

For something that takes maybe two or three minutes tops to use (navigating to find a name is the longest task), people do sure try to avoid using it. Here's what I found interesting - the only people who I saw actually use this were delivery people. When someone else tried to get into the building and see a resident/someone else approaching, they pretend they live there or are trying to get in to see someone. That person generally lets them in after them after swiping in. So much for security. But this also happened when the person who couldn't get in had their hands full - it is difficult to use the buzzer when people are juggling multiple things in their hands. How do you access it if you don't have even a finger free to reach up and use it? The system has no accessibility features built into it - there's no Braille available here versus in elevators or other public utilities. It has a proximity sensor (though this didn't trigger 100% of the time), so maybe it could have a voice component to allow a user to navigate without having to physically interact with the device. 

Is there a better way to do this? I think making the screen bigger and touch enabled to get rid of the number keypad as well as enabling voice commands for accessibility would help greatly, but the big design problem of enforcing non residents to use it, which is what the key goal of the buzzer is, still doesn't get solved effectively. In terms of that, I'm not so sure what to do there myself.