Mobile data at trade fairs and conferences: plan for the hall, not for the hotel

A hall is a hard place for a phone

Two things go wrong at once. The building itself stands between you and the masts outside: thick walls, metal frames, ceilings and pillars all weaken the signal, as we explain in no signal inside a building. Then the crowd arrives, and every visitor, exhibitor and journalist shares the capacity of the same cells, a problem we cover from the fan's side in no data at festivals and stadiums.

A fair is harder than a concert in one respect: it lasts all day, every day, and you need the connection for work, not for a story. And crowds move together: the first hour after the doors open, the minutes after a keynote and the lunch break are when many people reach for their phones at once, which is also when a client wants to see your demo or you need to find the next meeting.

What the venue Wi-Fi is for

Large venues run their own networks, and the better ones are honest about what the free tier is for. Messe Frankfurt offers free Wi-Fi throughout the grounds to registered users and says it is best suited to occasional surfing and checking email or messages: the data volume is unlimited, but speeds are limited because so many devices share it. For business use it sells a premium Wi-Fi package for exhibitors, booked through its exhibitor shop, with extra access points at the stand on the larger packages.

Other venues work along similar lines. IFEMA Madrid, for example, tells exhibitors that its technology team will advise on connectivity solutions for each need. The lesson for exhibitors is to treat connectivity like electricity at the stand: something you order in advance, through the organiser, before the deadline, not something you hope to find on the day.

If you are exhibiting

• Keep a local copy of every video, deck and demo on the laptop, and test it with Wi-Fi switched off.
• Order a stand connection through the organiser's exhibitor services if anything you show needs the internet.
• Use the phone as the backup line, connected to the laptop by cable rather than by Wi-Fi hotspot.
• Keep the phone on a charger at the stand: a phone sharing its connection all day is working hard.
• Sign in to the accounts you will need, with your two-step verification ready, before you travel.

A cable makes sense in a hall full of wireless networks, and our comparison of USB tethering and Wi-Fi hotspot explains the trade-offs. If you present remotely to someone back at the office, Microsoft notes that sharing a single window uses less bandwidth than sharing the entire screen, which matters on a shared connection.

If you are visiting

Do the online part before you walk in. Download the fair's app and open the floor plan, your agenda and your meeting list while you are still on the hotel Wi-Fi, and take screenshots of the halls and stand numbers you need. Put your ticket or badge in the phone's wallet if the organiser offers it; our article on keeping documents offline covers what works without a connection.

Agree a physical meeting point and a time with colleagues and clients, the stand number or a named entrance, instead of relying on messages to find each other at midday. Swap contact details in a way that does not need data at that moment, and send the follow-up in the evening. If you scan leads or business cards with an app, check before the fair whether it stores scans on the phone and uploads them later, or needs a live connection for each one.

Calls when the hall will not cooperate

Voice and video calls over data are the first thing to suffer in a congested hall, because they need a steady stream rather than an occasional burst. For calls that matter, step outside the hall or into a quieter area, or use the venue's meeting rooms. If your home operator offers Wi-Fi calling abroad, your usual number can make and receive calls over the venue or hotel Wi-Fi; Wi-Fi calling abroad explains when it applies.

Text is more forgiving than audio. A short message has a better chance of getting through in a gap than a voice note or a video call, so when a client is late, write rather than call. Keep your usual line active for texts and calls, so the people who have your number can still reach you, and leave the data to the line you set up for the trip.

Travelling to a fair abroad

A data eSIM for the country of the fair, installed at home, gives the phone its own connection from the moment you land and keeps your usual line for calls and texts. A Snoozim country pack works only in its own country, so a pack for Spain covers a fair in Madrid or Barcelona, while a trip that crosses borders needs the Europe pack. WhatsApp keeps working with your normal number either way.

Every purchase comes with an invoice showing VAT, which is what an expense report needs, and the work trip guide covers buying for a team. The data only starts counting at the first connection at the destination, so it can be bought with the rest of the fair logistics, weeks ahead.