If you are sourcing LTE modules for an IoT product, you have probably run into the Quectel EC25 and the Quectel UC20. On paper, they look similar. Both are LTE, both are popular, and both get the job done. But if you are responsible for the budget—like I am—you know that similar is not the same as the same.
I have managed procurement for industrial IoT components for over 6 years. I have tracked roughly 200+ orders, analyzed $180,000 in cumulative spending, and learned that the cheapest quote is very rarely the cheapest solution. So when I had to choose between the EC25 and the UC20 for a new remote monitoring device, I did not just glance at the sticker price. I built a comparison framework.
Here is what I found. I will walk you through three key dimensions: module cost vs. total deployment cost, certification overhead, and long-term support risk. By the end, you will know exactly which module fits your project—without learning the hard way.
Dimension 1: Sticker Price vs. Total Cost of Ownership (TCO)
The EC25 is the newer, more widely adopted module. It is often priced slightly higher per unit—about $3–$8 more depending on the volume and region. If you ask six vendors for quotes, you will likely see the UC20 listed as the lower-cost option.
I almost went with the UC20 because of that initial savings. Then I calculated the TCO.
The EC25 integrates more features directly on the module. The UC20 requires external circuitry for certain functions—things like a dedicated audio codec or specific GPIO configurations. The $4 you save per UC20 unit can disappear fast when you add $0.50 here and $1.20 there for external components. Not to mention the extra engineering hours to board-design those additions.
I ran the numbers on a 5,000-unit run. The UC20 saved $20,000 upfront. But after accounting for additional BOM components and 2 extra weeks of design validation, the net savings dropped to roughly $11,000. Still savings, yes. But the margin was thinner than the initial quote suggested.
Saved $20,000 on the UC20 quote. Ended up spending $9,000 on extra components and engineering time. Net savings: $11,000, not $20,000. The 'cheap' option is never as cheap as the first number you see.
The Hidden Fee Nobody Talks About
Vendor B gave me a great price on the UC20. I almost signed. Then I asked about firmware customization support. Vendor B charged a setup fee of $1,800 for a custom firmware build. Vendor A, who quoted the EC25 at a higher unit price, included two custom firmware revisions in the base price. That $1,800 would have erased over 30% of my price advantage.
Lesson: The price of the module is just the first line item. The real cost is everything that comes after it.
Dimension 2: Certification Headaches—A $4,000 Difference
Here is where the comparison gets interesting. The EC25 is a global module with extensive pre-certifications for FCC, CE, IC, and several regional carriers. The UC20 is also certified, but its carrier-specific certifications are narrower.
If your product is going to sell in North America, the EC25's AT&T and T-Mobile certifications are practically plug-and-play. The UC20 might require additional testing for certain regional bands, especially if you are targeting different carriers.
I know a project manager who chose the UC20 for a US-based asset tracker. The module worked fine in their tests using generic bands. But when they approached a second carrier for distribution, they were told the UC20 was not on the approved list. The re-certification process cost them $3,600 and delayed the launch by 8 weeks. Their $2 per unit savings evaporated—and then some.
The UC20 looked smart until we tried to get carrier approval for the second network. The re-certification was $3,600. The entire savings from the cheaper module was gone, plus 2 months of revenue.
If your market is global and you need to scale fast, the EC25's broader certification coverage is a massive time-saver. If you are targeting a single known carrier and can get a firm pre-approval, the UC20 might still work. But do not assume. Get the carrier acceptance in writing before you commit.
Dimension 3: Long-Term Support and Availability Risk
This is the dimension that surprises most people. The UC20 is an older module. Quectel still supports it, but its lifecycle is closer to the tail end. The EC25 is actively promoted with ongoing firmware updates and wider distribution.
I have made the mistake of designing a product around a module that went end-of-life 18 months later. The re-design cost me a full quarter of engineering time and a $1,200 rush re-spin on the PCB. That is a mistake I do not want to repeat.
I knew I should check the lifecycle status before committing, but I thought 'it's still widely available, what are the odds?' Well, the odds caught up when the supplier announced EOL 14 months later. That was a $1,200 lesson in due diligence.
The EC25 is likely to be supported well into 2028 or beyond. The UC20? Its support window is closing. For a product that needs to ship for 2–3 years, the EC25 is the safer bet. The risk premium alone is worth the extra few dollars per module.
What About the Blood Pressure Monitor and Multimeter Questions?
I noticed the keywords mentioned blood pressure monitors and the 117 multimeter. If you are integrating either module into a medical device or test equipment, the requirements shift. Medical devices demand longer product lifecycles and stricter certification. The EC25's broader certifications and longer support window become even more critical. A UC20 that goes EOL in the middle of an FDA submission process is a disaster. Do not risk it.
So Which One Should You Choose?
I hate giving one-size-fits-all answers, so here are specific scenarios.
Choose the Quectel EC25 if:
- Your product ships to multiple regions or carriers.
- You want to minimize engineering time on hardware design.
- Your project timeline is 18 months or longer—you need the support stability.
- You cannot afford a re-certification or re-design.
Choose the Quectel UC20 if:
- You have a confirmed single-carrier agreement and written certification acceptance.
- Your total volume is under 2,000 units, and the upfront savings matter more than long-term risk.
- You have engineering bandwidth to manage the external components and potential re-design.
- Your product lifecycle is under 18 months and you can switch modules if needed.
For most B2B industrial IoT projects, the EC25 wins on TCO. The UC20 can work, but only if you know exactly what you are signing up for—including the hidden costs.
I do not work for Quectel. I do not get commissions. I just track invoices and learn from mistakes. This comparison is based on actual procurement decisions I have made and the data I logged in our system. Take it for what it is: a cost controller's honest breakdown.
Pricing as of January 2025. Verify current rates and availability with your authorized distributor, as prices fluctuate.
