Five Hundred Scanners, Five Years: Choose the Network Before You Choose the Warehouse Scanner

What should you check before buying warehouse scanners?

Before buying warehouse scanners, check which network the fleet will run on for the next five years, then check that each candidate device can join it: the radio bands on the regional model you are being quoted, the date its manufacturer stops issuing security updates, and whether your warehouse applications will survive the move. Screen size, scan engine and drop rating matter too, but every serious handheld from Zebra, Honeywell or Datalogic now passes those tests. The network question is the one that is hardest to change later.

Most distribution centres last went through a full fleet refresh between 2019 and 2023, when Microsoft ended support for the operating systems their scanners ran on. Windows Embedded Handheld 6.5 left extended support in January 2020 and Windows Embedded Compact 2013 followed in October 2023, and operators moved, often in a hurry, to Android devices on the same Wi-Fi they already had. Those Android fleets are now three to six years old, batteries are fading, and the next refresh is arriving on budgets for 2027 and 2028. That refresh is the first one in which private 5G is a practical option for a UK warehouse, which is why we think the order of decisions matters more this time.

Why does the network decision come before the scanner decision?

The network decision comes first because a scanner's radio cannot be upgraded. Software can be patched and batteries swapped, but a device bought with Wi-Fi alone will never hold a cellular connection, and a device with a cellular modem that lacks the right band will never join the network you later build.

A typical fleet of rugged handhelds runs for five years and often seven. If a 3PL buys 500 Wi-Fi-only devices in spring 2027, the warehouse floor is committed to Wi-Fi until at least 2032, whatever happens to the racking, the stock profile or the yard. If the same 3PL buys devices with a 5G modem that supports the UK shared access band, it keeps both options open: the fleet runs on Wi-Fi today and can move aisle by aisle onto private 5G when the case for it is made.

We have written separately about why warehouse Wi-Fi fails and about the trailer yard beyond the dock door, where most warehouse networks stop altogether. This post is about the purchasing decision that sits upstream of both: what to put in the tender so the devices do not close the door on either answer.

Which 5G bands does a warehouse scanner need in the UK?

A warehouse scanner needs band n77 to use the spectrum Ofcom licenses for private 5G in the UK. Ofcom's shared access licence for medium-power private networks covers 3.8 to 4.2 GHz. Band n77 spans 3.3 to 4.2 GHz and includes that range; band n78 stops at 3.8 GHz and does not.

That distinction catches buyers out. A handheld marketed as "5G" may be sold in a European variant that carries n78 for the public networks and omits n77, because the public operators in Europe use n78. The same family name can have three or four regional models with different band lists. The only document that settles it is the band table for the exact model number on the quotation, and we suggest putting n77 support as a mandatory line in the tender rather than asking afterwards.

Three further checks belong alongside it:

• SIM or eSIM. The device needs a physical SIM slot or an eSIM that your network operator can provision, and it helps if the fleet management tool can push the eSIM profile without someone handling each device.
• Standalone 5G support. Private networks in the UK are increasingly built as standalone 5G, and some modems that list n77 for non-standalone public service behave differently on a standalone core, so the trial below needs to include a real standalone network.
• Dual radios. A device with both Wi-Fi 6E and 5G can run on whichever network is better in each part of the site during the transition, which is how most sites will move.

Ofcom's shared access licences also include low-power slivers at 1800 MHz and 2300 MHz, which some private LTE networks use. They suit small sites, but the capacity is limited, and for a large distribution centre we would plan on n77.

Will terminal emulation and the WMS survive a network change?

Terminal emulation and the warehouse management system will usually survive a network change, but the application architecture decides how gracefully. Many UK warehouses still run green-screen terminal emulation over Telnet or SSH, through clients such as Ivanti Velocity, because the WMS was built that way in the 1990s and the screens still work. Those sessions are fragile: a two-second gap while a scanner roams between access points can drop the session, and the operator logs back in and repeats the transaction.

Session persistence features in modern terminal emulation clients reduce the damage, and a private 5G network reduces the number of gaps in the first place, because the network rather than the device controls the handover between cells. Native Android applications that talk to the WMS over HTTPS cope better again, since they are written to retry a request rather than hold a session open.

A refresh is the natural moment to ask whether the green screens should move to native applications, and the answer affects the network design. A site that keeps terminal emulation needs a network with very few interruptions on the move. A site that moves to native apps tolerates more, and the business case for changing the network rests more on coverage in the yard and the dock area than on roaming in the aisles. Rewriting screens costs money and retraining time, though, and for a WMS nearing its own replacement it may not be worth doing.

How does peak season change the warehouse scanner plan?

Peak season changes the plan because it is when the fleet is largest and least well known. Black Friday falls on 27 November this year, and UK parcel and retail distribution runs at its peak from early November into January, with agency staff and short-term rental scanners added to cover it. Rental devices arrive configured by the rental house, often on a different OS build, and are enrolled in a hurry.

On a Wi-Fi network, a rental scanner joins with a pre-shared key or a certificate that someone has to load. On a private 5G network, it needs a SIM or eSIM profile from the network operator. Neither is difficult, but both need planning before the devices arrive, and a cellular fleet that ignores this will spend the first week of November chasing SIMs. We issue and provision the SIMs for the networks we run, and we would agree a peak pool of profiles with the operator in September so that rental devices are enrolled through the same fleet management tool (Zebra StageNow, SOTI MobiControl or Microsoft Intune, depending on the site) as the permanent fleet.

The arithmetic of a bad peak is easy to do on your own numbers. Take 400 scanners on a shift, assume each one stalls ten times a shift and costs 30 seconds each time, and the site loses roughly 33 hours of labour per shift, before counting the mis-scans keyed in later from memory. Pull your own figures from the WMS retry logs and the case for the network either stands up or it does not.

When is a Wi-Fi-only warehouse scanner the right choice?

A Wi-Fi-only warehouse scanner is the right choice when the site is a single compact shed with a stable racking layout, no yard operations on handhelds, and a Wi-Fi network that the logs show is working. In that case the cellular modem is cost without benefit. Devices with a cellular modem carry a price premium over the Wi-Fi-only model of the same family, and the modem draws some battery even when idle.

The calculation changes where any of the following is true:

• The yard runs on handhelds. Shunters, gatehouse staff and goods-in checkers using scanners outside the shed, where Wi-Fi rarely reaches.
• The site is several buildings. A campus of sheds connected by roads and yards, where devices cross outdoor gaps many times a shift.
• The stock is metal or liquid. Drinks, chilled and steel goods distort Wi-Fi in ways that change with stock levels week by week.
• The contract outlives the fleet. A 3PL with a long customer contract will refresh at least once within it, and a cellular-capable fleet avoids being stranded if the customer later asks for automation.

For most large UK distribution centres at least one of those applies. For a mixed estate, a sensible policy is to buy 5G-capable devices for the yard, goods-in and cross-dock roles and Wi-Fi-only devices for pickers in a well-covered shed, which keeps the premium where it earns its keep.

What should a logistics operator do before the next refresh?

Start with evidence the site already has. Pull the WMS transaction logs for retries, duplicate scans and transactions keyed at a desk long after the physical movement, and map them to aisles, doors and times of day. List the current fleet with model numbers, purchase dates and the manufacturer's end-of-security-update date for each, which Zebra publishes through its LifeGuard programme and Honeywell through Mobility Edge. That list tells you when the refresh has to happen, not just when it could.

Then run a trial before the tender closes. Ten devices from the shortlist, on a trial private 5G network covering the worst aisle, one bank of dock doors and part of the yard, for four weeks including at least one busy week, will show whether the band list, the standalone behaviour and the applications all work together. The fleet bought after that trial will decide the site's network options until the early 2030s, so the four weeks are well spent.

If you are planning a scanner refresh for 2027 or 2028, talk to us about a trial network before the tender goes out, or read more about our work across transport and logistics.