Most taco trucks should not buy a voice agent. That is the honest starting point, and any vendor who tells you otherwise is selling rather than advising.
A single truck doing walk-up business at a fixed corner, taking maybe six calls a week, does not have a phone problem worth $250 a month to solve. The people who should be looking at this are the ones with a second revenue line: catering, corporate lunch drops, big weekend pre-orders, or two trucks and a commissary. If that is you, the phone is probably already the messiest part of the operation, and it is worth reading on.
The phone in your pocket is the phone in question
Trucks almost never have a landline. Your number is a cell number, sometimes a personal one, and it sits in your Instagram bio and on the side of the truck.
That is not an obstacle. A voice agent answers a phone number, and the number's origin does not matter. There are two ways to wire it up and they are meaningfully different in how reversible they are.
Forwarding is the one to start with. You keep your number exactly as it is and set unconditional forwarding on your carrier account so incoming calls land at the agent instead of your handset. It takes a few minutes in a carrier app, costs nothing, and you can undo it just as fast if you hate the result. Every flyer and listing you have already printed stays correct.
Porting moves the number itself onto the new service. It is cleaner long term and it is not something to do in week one, because reversing a port is slow and irritating. Do it after you have decided to keep the setup. The porting process for restaurant numbers is the same for a truck as for a dining room.
One thing to sort out before either: if your business number is also your personal number, this is the moment to separate them. A voice agent answering calls from your kid's school is not the outcome you want.
Location of the day is the call you are actually getting
Ask any truck operator what people call about and you will hear the same answer. Where are you today.
You post it. People do not see the post, or they see yesterday's, or they saw a repost from a food blog three weeks old. So they call, usually while driving, usually within twenty minutes of when they want to eat. And you are on the flat top with a rail full of tickets.
This single question is why a voice agent can make sense for a truck even at modest volume. It is answerable, it is repetitive, and it is the highest-frustration call in your day. The agent needs the current location loaded somewhere it can read, which means a thirty-second morning update alongside the post you already write. If your schedule is fixed by day of the week, load it once and stop thinking about it.
Attach the rest of the standing questions to the same set: hours today, whether you are cash only, how long a pickup takes right now, whether you have the birria back on. That is the same standing-FAQ configuration any restaurant loads for hours and parking questions, just with a field that changes daily. The general truck version of this covers the shared ground.
Cash, card, and the checkout you do not have
A lot of trucks still run cash-heavy, and phone ordering is usually designed around card-on-file. Worth understanding what you give up.
If the caller pays at the window, the agent takes the order, sends it to your Square or Clover ticket rail, and quotes a pickup time. Nothing about your payment flow changes. What you lose is protection against no-shows, because there is no charge to fall back on when somebody orders twelve tacos and never appears.
The practical answer most trucks land on is a short pickup window and no held food past it. Say it in the confirmation so the caller has heard it, and let the rare abandoned order go. Twelve tacos is a real loss but it is not worth building a deposit system around at truck volumes.
If you do want to take card payment on the phone, that is a separate decision with real handling requirements attached, and collecting payment over the phone safely is worth reading before you turn it on rather than after. A text confirmation with the pickup time and the address is the cheaper improvement for most trucks, and SMS confirmations cut down the where-are-you callbacks considerably.
A two-person crew and a service window
Here is the operational limit nobody mentions in a demo. On a truck, the person who would take a transferred call is standing eighteen inches from the person cooking, and both of them have their hands full.
That means your escalation rules have to be tighter than a restaurant's. A transfer during a lunch push costs you the same interruption the phone was causing before, so keep the transfer list to complaints and catering inquiries and let everything else take a callback. Anything the agent cannot answer should end with a number captured and a promise you can actually keep, not a ring on the handset clipped to the prep table.
The other constraint is capacity. A truck's throughput ceiling is hard and low, and a phone channel that accepts unlimited orders during a rush will put you in the position of quoting fifteen minutes and delivering forty. If the system cannot cap or pace incoming orders, you need to handle it with the pickup times you quote.
Catering and a second unit are where it clearly works
The strongest case is not the truck window at all.
Catering calls are long, they arrive at bad times, and they are worth ten to fifty times a walk-up ticket. A corporate lunch inquiry that reaches voicemail while you are on the flat top is a real loss, and it is the kind of loss that recurs, because that office books somebody every month. An agent that captures date, headcount, location, and a callback number turns those calls into a list you work at 4 p.m. instead of a set of missed calls you notice at 9.
The second case is multiple units. Two trucks and a commissary means the location question multiplies and the ownership of the phone gets ambiguous. Centralizing it is worth something on its own.
If neither of those describes you, the honest answer is to wait. A single truck at a fixed spot with a handful of weekly calls is better served by a clear voicemail greeting and a consistent Instagram post, and there is a broader version of that argument in whether a small restaurant should buy this at all.
Do this before deciding anything: for two weeks, keep a note in your phone of every call you miss and what you think it was. If more than a couple of them were catering, you already have your answer, and current plan detail is on pricing.