An eSIM is a SIM built into the phone rather than posted out in an envelope. That sounds like a small change, and for one phone it is. Across a business it removes a surprising amount of friction: new starters can be live in minutes, travellers can add a local plan without losing their work number, and nobody has to hunt for the paperclip tool. Here is what changes, and what to check before you move.
The 30-second version
- An eSIM is a SIM profile downloaded to the phone, with no plastic card.
- New lines can be live in minutes, which matters most for new starters and replacements.
- Travel gets easier, because a local data plan can sit alongside your work number.
- Device support matters: most recent business phones support eSIM, older ones may not.
- Availability varies by network and tariff, so check before assuming.
On this page
What an eSIM actually is
Every mobile needs a SIM to identify it to the network. Traditionally that is a small plastic card. An eSIM does the same job with a chip already inside the phone, and the details are downloaded onto it, usually by scanning a QR code or through the phone settings.
The number, the tariff and the network are all the same as they would be on a plastic SIM. What changes is how the SIM gets onto the device, and how quickly it can be changed.
What changes for a business
- New starters are live the same day. No waiting for a SIM to arrive, which matters when someone starts on a Monday.
- Lost or broken phones recover faster. The profile can be reissued to a replacement handset rather than couriered.
- Travel is simpler. A local or travel data plan can be added alongside the work number, so the phone keeps working normally. See our guide to telling us before you travel.
- One phone, two lines. Personal and work numbers can live on the same handset, which suits BYOD arrangements.
- Fewer bits to lose. No trays, no adapters, no SIMs in drawers.
The catches worth knowing
- Device support. Most recent iPhones and flagship Android handsets support eSIM. Some budget and older devices do not, and a few business-focused devices still prefer a physical SIM.
- Moving between devices is not always as simple as swapping a card. Some transfers are self-service, some need the network to reissue the profile.
- Availability. Not every tariff supports eSIM, and support can differ between consumer and business plans.
- Process matters more. With plastic SIMs the phone is the constraint; with eSIM the account process is. It is worth knowing who can request a profile and how it is verified.
- Keep a fallback. For staff in places with poor connectivity, activating a profile needs a connection in the first place, so plan the first activation somewhere with Wi-Fi.
A practical rule
eSIM is excellent for phones and tablets used by people. For equipment in the field, a plastic SIM, or an embedded industrial SIM, is still usually the right answer.
How to move your team across sensibly
- Check the handsets. List which phones support eSIM and which do not. Most fleets are mixed.
- Move new lines first. New starters and replacements are the easiest place to start.
- Agree who can request a profile, and how you verify the request is genuine. This is the main security consideration.
- Keep a record of which line is on which device. It matters when somebody leaves.
- Do not rush the rest. There is no prize for converting a working phone on a plastic SIM.
Thinking about eSIM for your team?
Tell us what handsets you have and how your team works. We will tell you where eSIM helps, where it does not, and set it up either way.