The Truth About Cellular Signal Boosters

Anyone who lives and works on the road and requires a reliable internet connection has heard the same advice: Get a signal booster. Most of the big YouTube channels expound upon their merits, and how they significantly increase the strength of the signal you receive. A better signal means better internet, right?


Signal Strength vs. Data Rate

The number of bars you see on your phone or hotspot’s signal strength meter is exactly that — how strong your signal is. It’s natural to assume that the stronger the signal, the better your connection, and the faster your internet works. It makes logical sense.

The truth, though, is that there is no direct correlation between how strong your signal is and how fast or reliable your internet connection is. It’s true that a stronger signal is more likely to provide a good data rate, but this is far from always the case.

Imagine that cellular service in an area is like a pie. If you’re the only person eating the pie, congratulations, you have an entire pie to yourself. If you share it with two or three people, you still have a large piece of pie. But if 10, 20, 50 people try to get a piece of that pie, everyone’s piece is very small. It gets to a point where nobody gets enough pie to have a satisfying dessert.

How do we fix that situation? Bake more pies, of course. If you’re expecting 50 people at your party, you bake several pies, not just one. You build more capacity into your pie distribution system to make sure everyone gets a good slice of the pie.

Cellular networks do that by adding more towers and equipment. The problem is this equipment is far more expensive than more ingredients to make a pie. It isn’t cost-effective for them to build enough capacity into their system to serve everybody who shows up on vacation when only a fraction of that capacity gets used on a regular basis. They don’t make any extra money, and it costs them a lot, so they simply don’t do it.

I’ve been to places like Newry, Maine, and Hilton Head, South Carolina, where my signal strength was full scale, and I didn’t even have enough data to check my email. How is this possible? Both of these locations are popular vacation spots. Cellular providers install enough towers to adequately cover the usual number of people who live and work there. When a massive number of people come to visit the area on vacation, they have to share their data with everybody else there, so everyone’s data slows down. If too many people are competing for data at the same time, the data rate slows to the point of becoming unusable. This is also what happens in Quartzsite, Arizona, with an official population of 3,714 as of 2019, when it swells to literally a million or more during the winter.

Similarly, I’ve been out in the middle of nowhere with only two bars of signal, but had internet fast enough to watch high-definition video on. The signal wasn’t strong, but virtually nobody was using it, so I could still get a big piece of the pie.

The bottom line is that to get usable internet data, all you care about is getting a decently sized slice of pie.

Boosters Solve the Wrong Problem

Manufacturers of cellular boosters claim their devices can boost your signal from one or two bars to three or four. This is absolutely true. These devices work exactly as they are claimed to. And that’s the problem. Increasing signal strength does not automatically get you a faster data rate. In reality, it often doesn’t change it at all.

Another thing signal boosters can’t do is give you a signal where one doesn’t already exist. They can boost an existing signal, but they can’t create one from nothing. Only a better location can do that. You can obtain this either by moving someplace else, or by installing an antenna on the outside of your vehicle, as high as possible, to improve reception. A better antenna will not only let you receive a signal the tiny one built into your phone or hotspot can’t, it will also improve the strength of that signal, just like a booster will. But unlike a booster, an antenna CAN improve a signal where one didn’t previously exist.

My Experiment

One of my travel buddies and campmates in Quartzsite, Eugenia, has a WeBoost Drive Sleek cellular booster. She offered to let me try it out, so I did, and put my theories to the test. This is the most basic device WeBoost sells, for $199. It does have a small antenna that you place on your roof, which as I said will definitely improve reception. You place your phone or hotspot inside its cradle, plug it in, and watch the magic happen.

At our campsite, I had one to two bars of signal on my Verizon iPhone 11 Pro. (Data rates are already slow in early December, and will get even worse after huge numbers of nomads arrive in Quartzsite for events in January.) After I placed it in the cradle, that increased to three or four bars. That looks very impressive and is enough to convince most people that their internet speeds are suddenly better. But are they?

To find out, I used the Speedtest app. This runs some tests and measures your upload and download speeds over your current connection. While my phone was in the WeBoost cradle, I ran a test and got these results.

Then I took the cradle away and ran the same test again.

Although I still had three bars of signal, we moved the cradle far away from my phone and left the phone in the same place for consistency, yet it still showed three bars. The interesting part is that my download speed was just about identical with and without the booster in place. My upload speed was actually three times better without the booster than with it. I have no explanation for the improved upload speed.

Snake Oil?

Are boosters a scam? Are these companies making false claims to prey off of travelers who want to improve their cellular reception on the road? I can’t go that far and say they do. They are very careful to word their claims in ways that are 100% true. Boosters do improve your signal strength. This can improve your data rate, but many times it doesn’t.

I can say that their marketing departments aren’t going out of their way to clarify that there’s no direct correlation between signal strength and data rates. Instead, they’re giving away devices to countless YouTubers and other high-profile influencers to try out. Getting free equipment makes someone much more likely to give it a positive review, or at least not give it a negative one. Boosters certainly don’t make your reception worse, so you won’t see negative reviews out there.

In reality, though, I saw the same signal strength improvement through my Netgear MIMO antenna as I did through the WeBoost Sleek. My antenna cost $49, as opposed to $199 for the WeBoost. That’s the “cheap” one, and the cost only goes up from there. Plus, by mounting the larger Netgear antenna in a window on the side of the vehicle closest to a tower, it’s possible to pull in a signal that your phone or hotspot might not receive with its built-in antenna.

So while I wouldn’t call boosters the digital nomad version of snake oil, I would recommend that you save your money, don’t buy a booster, and invest in an antenna instead. You can buy an affordable one like I did, or buy a really high-end antenna for the same cost as the least expensive booster.

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