Business mobiles, SIMs and eSIMs
Mobile connectivity on all four UK networks
Handsets, SIM-only, eSIM and data SIMs on EE, Vodafone, O2 and Three. We recommend a network based on coverage where your staff work, then set spend limits and alerts to keep usage under control.
EE, Vodafone, O2 and Three 30-day rolling SIMs available eSIM activation in minutes
Network-neutral
Chosen on coverage at your sites
Spend alerts active
Usage visible online
Network selection
The right network for your locations
As an authorised reseller for all four UK networks, we recommend whichever performs best where your staff work.
EE
Extensive national 4G and 5G coverage, often the strongest choice for staff who travel widely.
Vodafone
Established business network with strong 5G coverage in major towns and cities.
O2
Flexible business tariffs and good in-building coverage in many areas.
Three
High data allowances and a growing 5G network, well suited to data-heavy users.
Engineer’s note
How we choose a network
Published coverage maps are a useful guide, but in-building signal varies. Where coverage is uncertain, we check signal at your premises before recommending a network.
Connection types
Handsets, SIMs, eSIMs and data
Every option is available on any of the four UK networks.
Handsets on finance
Current Apple, Samsung and Google handsets on monthly payments, avoiding upfront capital cost.
SIM-only (voice and data)
Business airtime for existing handsets, with the option of a 30-day rolling term.
eSIM
A digital SIM delivered by QR code and activated in minutes. Useful for new starters and replacement devices.
Data-only SIMs
4G and 5G data for routers, payment terminals, alarm communicators, CCTV and lift autodiallers, including replacements for PSTN lines.
Usage controls
Per-user spend limits and alerts, so allowances are not exceeded without approval.
Fixed-mobile integration
The Linkus or Horizon app lets a mobile work as an extension of your office phone system.
| Physical SIM | eSIM | |
|---|---|---|
| Delivery | Posted or collected | QR code sent by email |
| Activation time | On receipt of the card | Typically minutes |
| Replacement if lost or damaged | New card required | New QR code issued |
| Two numbers on one handset | Requires a dual-SIM handset | Supported on most eSIM handsets |
| Device compatibility | All handsets | Most recent iPhone, Samsung and Google models |
eSIM activation
How an eSIM is provisioned
Order
Lines, network and handset compatibility confirmed
QR code
A secure activation code issued to the user
Scan
Code scanned in the handset settings
Active
Number live, with support if required
Engineer’s note
Checking eSIM compatibility
On an iPhone, go to Settings, then Mobile Service, and look for Add eSIM. On Android, the option is usually under Settings, then Connections or Network and internet. If you are unsure, send us the handset model and we will confirm.
Account management
Visibility and control over mobile spend
Online account management gives a single view of every connection on the account. Spend limits, usage reports and alerts help identify unusual activity before it becomes a cost.
- Spend limits configured per user
- Usage reports by user and cost centre
- Alerts before allowances are exceeded
- One consolidated monthly invoice
Customer story
Four phone suppliers brought down to one
The problem: The customer’s phone services were spread across four separate suppliers, and the billing was all over the place.
What we did: Reviewed every service, simplified the setup and brought it under one provider and one support team.
The result: Simpler billing and better service across the board.
“They have vastly improved all our services.” From the customer’s Google review.
FAQs
Frequently asked questions
Do we need new handsets?
Not if your current devices are in good condition. A SIM-only plan on a 30-day rolling term is often the most economical option.
How do we keep our numbers?
Request a PAC from your current provider for each number. We use these to port the numbers on an agreed date.
Can an existing number be moved to an eSIM?
Yes. A number can be converted from a physical SIM to an eSIM, or ported from another provider directly onto an eSIM.
Can SIMs replace PSTN lines for equipment?
In many cases, yes. Payment terminals, alarm communicators and lift autodiallers can operate over 4G or 5G. Certification requirements for alarms and lifts should be confirmed with the relevant maintenance provider.
Can one handset carry a work and a personal number?
Yes. Most eSIM-capable handsets support two active lines.
How do you decide which network to use?
We compare coverage at the locations your staff work from and, where needed, test signal on site before recommending a network.
Request a mobile review
Tell us how many connections you have, which network you use and when the contract ends. You can also email a recent bill to hello@maincoms.co.uk. We will compare networks and plans and recommend the most suitable option.
Contact
Speak to an engineer
Tell us about your site and what you need. One of our engineers will review the details and reply, usually within one working day.
5 Acorn Business Centre, Northarbour Road, Portsmouth PO6 3TH
Monday to Friday, 09:00 to 17:15
Out-of-hours support by arrangement