I'm the office administrator for a 300-person manufacturing company. I manage all our telecom and IT ordering — roughly $150k a year, spread across 8 different vendors. I report to both operations and finance, which means I've learned to be very careful about what I buy. A router purchase can turn me into a hero or a punching bag.
When I first started managing telecom purchases, I assumed all "Sierra Wireless" products were basically interchangeable. My first search for a replacement cellular modem returned a bunch of hits for the 2020 GMC Sierra wireless CarPlay system — a truck feature, not a network device. That was my first clue that the Sierra name creates some annoyingly mixed search results. But after 4 years and about 120 small-scale networking orders, I've settled into a checklist that prevents me from making expensive mistakes.
Here are 5 things I check before buying or deploying any Sierra Wireless cellular modem or router.
Step 1: Check if the Device Is Carrier-Locked Before You Buy
This is the step most people skip. Everyone thinks about how to unlock a phone, but the same logic applies to cellular modems and routers. Many Sierra Wireless devices are sold locked to a specific carrier — especially if they're refurbished or came directly from a carrier. If you plan to use the device on another network, you'll need an unlock code through the carrier's official process.
The tricky part: unlocking a modem is slower than unlocking a phone. Carriers don't always treat a modem as a mobile device. They may require proof of purchase and a completed contract term. I once bought an "unlocked" modem that turned out to be tied to Verizon. Getting it unlocked took 6 days — no, 9 days — because they had to chase down the original account holder. That delay blew a project deadline and made me look bad to my VP.
Now I verify IMEI or serial number against the carrier's compatibility and lock status list before I place an order. Per FTC guidance on advertising practices (ftc.gov), a device can only be marketed as "unlocked" if it's actually free from carrier restrictions. So if a seller says "unlocked," I also check directly with the carrier. Trust me on this one: if you skip it, you'll find out the hard way.
Step 2: Match the Radio Bands to Your Carrier's Network
Not all routers are created equal when it comes to frequency support. A Sierra Wireless modem that works on AT&T may not work on T-Mobile, Verizon, or a regional carrier. The device may have a compatible SIM slot, but the modem's radio bands determine whether it will actually connect.
Look at the exact model number. For example, the Sierra Wireless AirLink RV50 supports specific LTE bands, while the newer AirLink LX60 or MC7455 may support additional bands. I once ordered a batch of RV50s that worked perfectly on our old network but didn't support a band our carrier deployed in 2023. We had to ship them back and pay restocking fees — around $1,800 total, which was out of our department budget.
Here's a simple way to avoid this: check your carrier's "bring your own device" list to see which Sierra Wireless models are approved. Pay special attention to band 14 if you're in the public safety space. Sierra Wireless is strong in that area, but you still need to confirm the model's spec sheet. Don't assume a modem will work just because the model number looks familiar.
Step 3: Verify Power Input and Physical Design
You'd think this is basic, but it's easy to miss when you're buying from a spec sheet. Sierra Wireless industrial routers are often designed for harsh environments. They have wide-voltage DC power input, extended temperature ranges, and rugged connectors. If you're mounting one in an outdoor cabinet or a vehicle, those specs matter more than the wireless speed.
For example, a colleague suggested the Platinum BP5450 as a lower-cost backup power unit. I looked at the specifications and it seemed fine — until I noticed it couldn't handle the temperature range in our outdoor enclosures. We would have had units failing every summer. We stuck with a Sierra Wireless router that was properly rated for the environment.
Ask yourself a few questions: Does the device accept 9–36V DC input? Does it have a DIN rail mounting option? Is the casing IP-rated for dust and water? If you're placing it in an office next to a switch, maybe you don't need industrial specs. But for anything mission-critical, "it's just a router" is a phrase that has cost me a lot of money.
Step 4: Plan for Remote Configuration and Security
Once the modem is installed, how are you going to manage it? This is where good purchases become great — or painful.
Look for features like cloud management, remote reboot, VPN support, and configurable APN settings. Sierra Wireless has a management platform called AirVantage, but not every model supports every feature. When we deployed 15 routers at remote sites, I learned this the hard way: we couldn't reboot them without driving out to each location.
Make sure the router supports at least one secure way to set the APN and authentication settings. If your carrier uses a private APN, you'll need to specify the SIM's APN manually. Also check whether the router supports VPN protocols like IPsec or OpenVPN, especially if it's going to send sensitive data back to your office.
It sounds like a lot, but spend 20 minutes verifying these settings before you buy. If you've ever had to drive 40 miles just to reboot a router, you know that 20 minutes is nothing.
Step 5: Confirm Lifecycle and Firmware Support
This is the one I wish someone had warned me about. Sierra Wireless, like all hardware vendors, eventually ends support for older models. Before you buy, check the product lifecycle page to see if the model is still in active production or if it's approaching end-of-life (EOL).
Also check whether firmware updates are available and accessible. A router that hasn't received a security update in 2 years is a liability, especially when you're connecting to a corporate network. I found this out after buying a batch of modems that were basically abandoned by the vendor. We ended up having to replace them sooner than planned.
If the device is EOL but still on sale, be very careful. It might be cheap for a reason. Look for the "last order date" and "last support date" in the product lifecycle. You want at least a couple of years of support left in the product, or you'll be right back in procurement again.
There's something satisfying about a modem that just works after following a checklist like this. After all the missed deadlines and restocking fees and vendor calls, the small checks are what protect your budget.
Bonus: Common Mistakes to Avoid
- Don't confuse GMC Sierra with Sierra Wireless. A 2020 GMC Sierra wireless CarPlay is a feature on a pickup truck, not a network device. Double-check your model number — I've seen people order car accessories by mistake.
- Don't assume a "factory unlocked" device works everywhere. Some carriers maintain whitelists of approved devices, even when the device is technically unlocked. Confirm with your carrier before you install.
- When you need to unlock a phone or modem, use the carrier's official process. Third-party unlock services can void warranties and sometimes don't deliver. The FTC has pursued cases involving misleading unlock claims, but the official route is still the safest.
- Don't ignore accessories. Antennas, cables, and power adapters can vary by model. A router that ships without the right antenna might not receive a signal at all.
At the end of the day, purchasing connectivity gear is mostly about avoiding the things that make your internal customers angry. If you take the time to run through these steps, you'll save yourself a ton of trouble — and maybe a few thousand dollars.