If you’ve been in the market for a new car, truck or SUV recently, you’ve likely encountered the convenience of smartphone control options. These features allow you to perform tasks like locking the doors or starting the vehicle remotely from your smartphone. However, the reality is that many of these factory-installed systems can be frustratingly slow – a common pain point for many of us. You’re not alone in this: A member of our team has two brand-new vehicles in their driveway, both with comparatively sluggish smartphone control systems. Let’s delve into how these systems function, why they’re slow and, most importantly, what solutions can alleviate this frustration.

What Is a Smartphone Control System?

It should come as no surprise that computers control modern cars and trucks. Decades ago, a fuel-injected vehicle might have had a computer to control the spark plugs and fuel injectors. Today, everything from the headlights and infotainment system to the suspension, collision-avoidance systems and engine is controlled by computers. These computers are typically linked through a network data bus. In the not-so-distant future, vehicles will be able to communicate with each other, opening up a world of possibilities. The intention is to reduce accidents and traffic congestion using machine-learning software and your vehicle’s real-time location. These are called vehicle-to-vehicle systems, or V2V for short.

The benefit of linking all the features and systems in a car or truck is that one can respond to another. For example, some luxury vehicles will lower the air conditioning or heater fan speed to make using Bluetooth hands-free calling easier. Some advanced collision-avoidance systems produce warning sounds through different speakers in the vehicle, depending on where an object is. A turn-signal activation might trigger the infotainment system to display the image from a camera on the side of the car. A parking sensor on the vehicle’s rear might apply the brakes to prevent a collision.

We love the simplicity and ease of troubleshooting electrical systems that use mechanical switches and relays. However, the benefits of computer control can’t be denied.

Smartphone Control Integration

So, how can an app on a smartphone communicate with the computers in your car or truck? It uses cell phone towers and cellular radios or modems. Unlike an old cell phone optimized exclusively to transmit and receive voice information, modern cellular radio modules are just as good at sending massive amounts of data. Those of us who like to watch YouTube on our phones understand this. Essentially, the phone acts like a modem connected to our home’s cable or phone service provider. However, rather than a wired connection, the information is broadcast over the air to a nearby cell phone tower. From there, it’s on the internet, and you can reach whatever server and website you want.

Most new cars and trucks include a cellular data radio to communicate with a centralized server to provide vehicle information. This connectivity allows commands from the app on your smartphone to be relayed to the vehicle and vice versa.

Say you want to use your smartphone to make sure your truck’s doors are locked before you go to bed. You launch the app on your phone, then press the lock button. The app will send a message, along with your username and password, to a server operated by the vehicle manufacturer or a third-party company contracted to provide the telematics service. The message is already on the internet if connected to your home Wi-Fi. If you aren’t home and are using a cellular data connection, the message is sent to the cell phone tower, which then passes it along to the cell phone provider’s connection to the internet.

After the server has authenticated the message, a new message with the command is sent to your vehicle. This message travels through the internet to the cell phone service provider tied to your car. From there, the message goes to a cell tower near your vehicle. The message is broadcast digitally to the cellular radio in your car. That radio will recognize the command and send a digital message to the body control module to lock the doors.

Once locked, the process reverses. The vehicle confirms that the door lock request has been executed and returns that confirmation to the smartphone app along the same path.

These messages might travel the entire length of a state or province or even across the country to authenticate and execute commands. It is truly fascinating that any of this can happen in a reasonable amount of time.

Benefits of Smartphone Vehicle Control

Having smartphone control of some of your vehicle’s features is extremely convenient. For example, being able to check to make sure the vehicle is locked from your home or office is excellent. With that said, this isn’t a time-sensitive process from the perspective of waiting for the information. However, if you’re walking out of a store or your home and you want to pop the trunk or open the hatch, it would be nice if that were done by the time you got to the car. The same goes for unlocking the vehicle. Sure, most vehicles with smartphone apps also have keyless entry systems. Nevertheless, the app should work fast enough that you are never waiting.

In reality, the choice of cellular data providers and the companies that host the authentication services plays a considerable role in determining the time it takes for your vehicle to respond to commands. If Mazda wanted to reduce operational costs on the MyMazda service, they could select a less expensive, lower-priority service from the cellular data provider. We’ve seen smartphone control systems that take more than a minute and others under two seconds. That’s a significant difference.

Testing Smartphone Apps on Modern Vehicles

We’ll examine smartphone app responsiveness with the MyNissan app and a 2023 Nissan Rogue. After the vehicle had been sitting idle for a few hours, we sent an unlock command from the smartphone. It took 10.8 seconds for the vehicle to respond. We followed this by sending a lock command. That took 3.7 seconds.

Next, we have the MyMazda app and a 2025 Mazda CX-70 PHEV. The test criteria are the same. The vehicle has been sitting idle for several hours. The delay between sending the unlock command and the vehicle responding was 16.6 seconds. The delay to relock the vehicle was 4.7 seconds.

As you can see, sending a second command is much faster. We hypothesize that some of the account authentication processes on the server have already been completed, and your information is now in the cache rather than buried on a storage device.

One MyMazda function regularly used on the Mazda is checking the battery charge status. Oddly, this process takes an abnormally long time – we measured 31 seconds. It’s faster than walking to the vehicle, but not much.

To put these wait times into perspective, the average adult walks about 17 meters or almost 56 feet in 17 seconds. If you are leaving a store and want to remote-start the vehicle, you might be halfway across the parking lot before it gets the start command.

Drone Response Time

Let’s compare this response time to an aftermarket vehicle control solution like Drone from Firstech. You should be familiar with Firstech, which manufactures Compustar remote car starters and Momento dashcams. Sending an unlock command to a vehicle requires less than two seconds. The lock command was executed in under two seconds. We’ve seen a few instances where, just like the OE systems, the first request takes a bit longer than the subsequent, but they are always a fraction of what the OE systems we’ve tested provide.

When the Drone updates, it also provides battery voltage and the temperature inside the vehicle. All of that takes only 2 seconds.

What about Bluetooth Control?

Some OE and aftermarket smartphone control solutions can communicate with your vehicle using a Bluetooth data connection. Tesla uses this technology in many of its vehicles. Once in range, your smartphone will connect to the vehicle using Bluetooth, and pressing a button in the app will result in a near-instantaneous response from the vehicle. The drawback here is range. Bluetooth might work up to 100 feet under absolutely ideal conditions. This will work as an entry authentication solution but not for something like a remote starter when you are far away.

Shopping for Smartphone Control Solutions

If you want to be able to control and monitor your car, truck or SUV from anywhere in the world where you can access the internet, visit a specialty mobile enhancement retailer and ask them about the solutions they offer.

Before committing to purchasing anything, ask for a real-life demonstration. How long does it take for the vehicle to respond to commands from the phone? Is it a second or two, or slow? Next, ask what functions the system can control in your vehicle. We would expect that door locks are a minimum and that you will likely add this control system to a remote car starter. Beyond that, you may have the option of automatic rear window defroster, heated seat and heated steering wheel activation if your vehicle has those features. Hatch or trunk release is another popular feature, along with sliding door control on minivans.

These days, we need to do everything in our power to keep our vehicles safe. Ask if the control system has geofencing options and if it will provide towing alerts. Find out if you can upgrade the system with a security sensor to monitor for impacts, motion, tilting or glass breakage. Advanced security features are never offered on factory-installed smartphone control systems.

Once you have a clear image of the options available, you can choose those that meet your needs. Of course, features and pricing aren’t all that matter when selecting a shop to upgrade your vehicle. Do your research to make sure that the technicians working on your car or truck are appropriately trained, use reliable connection methods and pay attention to the details when integrating the system into your vehicle. Look to see if the shop uses seat, steering wheel and fender covers while working on the vehicle. Find out if they put the vehicle battery on a charger to keep it topped up while they have the doors open. All these small items seem simple, but they are signs that the shop you are researching cares about their work and your car or truck.

This article is written and produced by the team at www.BestCarAudio.com. Reproduction or use of any kind is prohibited without the express written permission of 1sixty8 media.