Cellular badge trackers: a buyer's guide for contractors

A cellular badge talks to the carrier network, not to site equipment

A cellular badge tracker carries a SIM and a low-power cellular radio, so each reading goes from the badge to a carrier's tower and on to the software. Nothing on the jobsite has to receive it. That is the whole difference from badge systems that need receivers installed where the work happens.

Most cellular badges use one of two standards built for small, battery-powered devices: LTE-M and NB-IoT. Both were standardised by 3GPP, the body that writes mobile network standards, and 3GPP completed NB-IoT in Release 13 in June 2016 alongside eMTC (the standard marketed as LTE-M). The GSMA describes both as low power wide area networks run by mobile operators in licensed spectrum.

LTE-M

LTE Cat-M1, reusing the carrier's installed LTE network. The GSMA lists handover between cells while a device is connected as a baseline LTE-M feature, which matters for a badge that moves all day.

NB-IoT

A narrowband radio built for small, infrequent messages, often from devices that stay put, such as meters. The GSMA lists connected-mode mobility for NB-IoT as a newer feature that operators may or may not support.

The GSMA Mobile IoT Deployment Guide (February 2026) describes the two as complementary, often deployed side by side, and expected to remain in service well into the 2030s. That matters when you buy a badge you plan to keep for years.

The detailed differences belong in their own article: see LTE-M vs NB-IoT. For buying a badge, the practical question is which of the two your carriers support on your sites.

Cellular, BLE and LoRaWAN badges differ in what you install on each site

The real difference between badge types is what has to be on the jobsite before a badge reading counts. A BLE badge needs a reader or gateway within range. A LoRaWAN badge needs a gateway that relays to a network server. A cellular badge needs carrier coverage and nothing else.

Check cellular coverage on your actual sites, inside and out

Coverage is the first thing to check, because a cellular badge is only as good as the signal where your crews work. Use the carrier maps and the FCC National Broadband Map for a first look, then test on site.

1. 1

   List your next 90 days of jobs

   Include the shop, your usual supply houses and any remote or rural work, not just the big jobs.

2. 2

   Check each address on the map

   Note which carriers show LTE coverage. A badge on one carrier is only as good as that carrier's coverage.

3. 3

   Walk the worst spot on each site

   Ask for a trial badge and carry it to the lowest level, the mechanical room and the far corner of the building. See whether readings arrive or are stored.

4. 4

   Ask what happens with no signal

   A badge should store readings and upload them on reconnect with the original timestamps. If it simply loses them, your timesheets will have holes.

Check battery life at the reporting interval you will actually use

A battery figure only means something next to its reporting interval. Every report wakes the radio and uses power, so a badge that reports every minute transmits five times as often as one that reports every five, and the battery drains faster.

• Ask whether the battery figure assumes the badge is off between shifts or on around the clock.
• Ask how the battery figure changes in weak signal. LTE-M and NB-IoT reach deep coverage by repeating messages (the GSMA guide describes up to 2048 repetitions in the deepest LTE-M coverage mode), and repeats cost energy.
• Ask how the office is warned about low battery, and at what level.
• Ask what the charging routine looks like for a crew of 40, not for one badge on a desk.

Check that the badge is certified for US networks

A cellular device sold in the US needs FCC equipment authorization, and network operators rely on industry certification such as PTCRB before they accept a device. Ask for the paperwork rather than assuming it.

FCC authorization

The FCC requires RF devices to be authorized under 47 CFR part 2 before they are marketed or imported into the United States. Ask for the FCC ID and look it up yourself.

Network certification

PTCRB certifies cellular devices and modules for compliance and performance on operator networks. Ask which certification the badge and its module hold, and which carriers have approved it.

Check that the software turns readings into timesheets

A badge on its own produces a stream of location readings. What a contractor needs is a weekly timesheet: shift start and end, hours by jobsite, transit between sites, and a short list of things to fix before payroll. A tracker that stops at a dot on a map leaves the office to build that timesheet by hand.

Ask every vendor to show one real week built from badge readings, including a day where a worker moved between two sites and a day with a dead zone.

Where ZeroBadge fits

ZeroBadge is a cellular badge with the timesheet software built around it. The badge has its own cellular connection, reports about every 5 minutes, and stores readings when signal drops. Jobsites are geofences drawn from an address, so there are no gateways, beacons or kiosks on any site.

• GPS outdoors, Wi-Fi positioning indoors (learned over the first visits to each site), cellular continuity in between, labelled low confidence.
• Every minute is classified on site, in transit or other and allocated to a jobsite. A move between sites stays one shift.
• One month or more on a charge, with a low-battery alert at 25% by default. Under qualifying operating conditions. Battery life varies with reporting frequency, signal conditions, usage, and configuration.
• A manager approves the week, then approved hours are sent to your payroll provider. ZeroBadge integrates with payroll providers, with CSV, Excel and PDF export.