On the other hand, vampires could break into any building that relies on IR sensors for alarms. No life, no heat. Depending on which law of vampire physics they rely on not to show up in mirrors, security cameras could be out as well.
As it always seems to in these threads, it depends on the type of vampire. In this case, it also depends on the type of screen.
If the screen works with a stylus, then even a dessicated-corpse sort of vampire should be able to use it. With a non-stylus-friendly screen, they’re probably out of luck, but other vamps might still be able to use the phone. Most of them look relatively human, which means they shouldn’t be all that dry under normal circumstances. Maybe they’d have trouble if they haven’t fed recently, and the tank was running low, but that generally seems to bring more serious problems than unresponsive touchscreens.
As for IR sensors, one fairly common trope is for vampires to be warm and/or flushed after feeding. Assuming the mirror business doesn’t interfere, a well-fed vamp should show up readily enough on passive infrared. Active infrared should generally spot them even if they’re at room temperature; it’s not looking for warm spots, it’s looking for changes in IR reflection patterns in the room–and no one has ever suggested that vampires themselves don’t reflect light, I don’t think.
A vampire could carry around one of those little packets of moist towelette thingies (their name escapes me at the moment), to moisten his fingers with. That would help with the touch screens I presume, and he could pass it off as being germophobic.
I’m not sure I buy that his hands wouldn’t have moisture, either. Vampires are usually described as cold, but they’re not desiccated. They have a circulatory system, saliva, tears (sometimes of blood), etc.
Thing about this for a moment. So you decide to go the whole “vampires can’t show up on camera route”. That doesn’t mean their clothing won’t show on camera. Before CCTV this wouldn’t have been much of a problem, but now security cameras are everywhere (especially in the UK). So you don’t even need an ATM, just monitor ordinary cameras for footage of clothing walking around by itself. Yes, vampires would easily hide from the cameras by going nude, but that would make it very hard for them to blend in with living humans in public.
I recall a novel, The Logical Magician that had that scenario. The hero held off a vampire by standing in a working jacuzzi - running water - and then one of his friends fried the vampire with sunlamps.
For movies, it’s not “full spectrum” but UV weapons did burn vampires in Blade and Underworld.
Ultraviolet (the British TV series, not the Milla Jovovich movie) addressed some of them. In that one, cameras could not see them, and microphones could not hear them. In order to use a telephone, they had to use one of those keyboards that deaf people use.
The no-reflection thing, at least in the Whedonverse, does not extend to security camersas. I think it’s an illusion created entirely in the person’s mind and is not triggered by cameras. Admittedly, if you thought about it hard enough you might be able to cause it to, but why would you want to do that?