Business

How Heat Geek are shrinking their carbon footprint with Honest SIMs

With 120 engineers across the UK, Heat Geek has found a mobile network that can scale fast while staying true to their sustainability mission

Honest
Thu Jul 03 2025

Key benefits

  • Full control through self-serving in the Honest hub

  • Matching sustainability standards 

  • Support in seconds, not days

From day one, reliable signal has been critical for Heat Geek. Their nationwide team of engineers need business SIMs to keep them connected while helping homeowners to decarbonise their homes by making it simple to switch to a heat pump, especially in areas where signal can be hit and miss. 

And signal isn’t their only must-have.  

“Sustainability is at the core of what we do,” explains Sian Elder, Community Manager at Heat Geek. “We wanted a sustainable and ethical mobile network that reflects our massive climate ethos.”

As the UK’s first B Corp mobile network, Honest stood out – and its self-serve hub and fast support ticked even more boxes for Heat Geek.

Getting connected from day one

Once Heat Geek decided to join Honest, they set up their management team right away with physical SIMs. Next they set up their engineers with eSIMs to make the process even quicker. 

“The onboarding process with Honest is brilliant” says Sian. 

Now, Heat Geek’s engineers use Honest SIMs in iPads central to their day-to-day work – from scanning houses and designing systems, to sharing proposals and training on the move.

“Before, we relied on homeowners’ wifi. Now, Honest gives our Heat Geeks access to a whole world of information, wherever they are,” says Sian. 

This includes asking fellow engineers questions on WhatsApp, sharing advice in Facebook groups and using training hubs to upskill – all powered by Honest’s business SIMs.

Honest business SIMs let Heat Geeks get the job done
Honest business SIMs let Heat Geeks get the job done

Easy onboarding with the Honest Hub

The Honest hub gives Heat Geek full control of SIMs for its team of 120 engineers (and counting), from onboarding to monitoring usage. 

“Whenever we need new eSIMs, I order in the Honest hub. They’re instantly emailed to the Heat Geek for them to activate,” says Sian. “It makes life much easier, especially if they’re in low signal areas.”

When Heat Geek needed help during mass onboarding, Honest’s customer support was there to help right away.

“The support from Honest has been incredible,” says Sian. “The team is always ready to help out.”

It’s not just Heat Geek’s engineers who benefit from the Honest hub and speedy support. Managers use the hub to keep tabs on SIMs, check usage, and stay on top of costs.

“The Honest hub makes it so easy to manage our SIMs,” says Sian.

The Honest hub. Self-serve your SIMs, add new starters, assign cost centres and toggle roaming in a click.
The Honest hub. Self-serve your SIMs, add new starters, assign cost centres and toggle roaming in a click.

Sian’s final thoughts on Honest business SIMs?

“Our experience with Honest has been brilliant. The support is amazing and the team are always on hand to help.”

Want to keep your team connected? Book a meeting with our Head of Sales to get started.

Or check out Heat Geek to get a free instant estimate to decarbonise your home.

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