Business mobiles in Northern Ireland: what should you check on contracts and upgrades in 2026?

Business mobiles for a Northern Ireland firm cost far less than most renewals suggest. In November 2026, the big UK networks listed business SIM-only plans from about £8 to £25 per line per month ex VAT on 24-month terms ^{1Source 1Business SIM only deals and contracts — EE Business (prices ex VAT).business.ee.co.uk/sim-only/Accessed 4 November 2026See in Sources2Source 2Business SIM only deals — Three Business (prices ex VAT; offers 18 September to 11 November 2026).www.three.co.uk/business/simAccessed 4 November 2026See in Sources}, and a new iPhone 17 or Samsung Galaxy S26 on a business plan from about £49 to £57 a month ^{4Source 4Apple iPhone 17 business plans — EE Business (prices ex VAT).business.ee.co.uk/phones/apple/iphone-17/Accessed 4 November 2026See in Sources5Source 5Samsung Galaxy S26 business plans — EE Business (prices ex VAT).business.ee.co.uk/phones/samsung/samsung-galaxy-s26/Accessed 4 November 2026See in Sources}. Before you renew, check three things: the price rise written into the contract each year, whether every line is still used, and whether company phones are managed so business data can be wiped if one is lost. Coverage is rarely the deciding factor any more: Ofcom says all four networks reach 97% of Northern Ireland outside premises ^{6Source 6Nations report 2025 (Connected Nations, Northern Ireland) — Ofcom, 19 November 2025.www.ofcom.org.uk/phones-and-broadband/coverage-and-speeds/nations-report-2025Accessed 4 November 2026See in Sources}.

The short version

• SIM-only is usually the cheapest way to run corporate mobiles if you buy handsets outright or keep them for longer ^{1Source 1Business SIM only deals and contracts — EE Business (prices ex VAT).business.ee.co.uk/sim-only/Accessed 4 November 2026See in Sources2Source 2Business SIM only deals — Three Business (prices ex VAT; offers 18 September to 11 November 2026).www.three.co.uk/business/simAccessed 4 November 2026See in Sources}.
• Every major network now writes a fixed annual price rise into business contracts. Find it in the contract summary before you sign ^{1Source 1Business SIM only deals and contracts — EE Business (prices ex VAT).business.ee.co.uk/sim-only/Accessed 4 November 2026See in Sources2Source 2Business SIM only deals — Three Business (prices ex VAT; offers 18 September to 11 November 2026).www.three.co.uk/business/simAccessed 4 November 2026See in Sources18Source 18Business Multibuy SIM terms — Vodafone UK.www.vodafone.co.uk/business/business-mobile-plans/multibuy-simAccessed 4 November 2026See in Sources}.
• Ofcom's price-rise and end-of-contract protections cover businesses with ten or fewer workers; larger firms rely on the contract itself ^{7Source 7Statement: prohibiting inflation-linked price rises — Ofcom, 19 July 2024.www.ofcom.org.uk/consultations-and-statements/category-1/review-of-inflation-linked-telecoms-price-risesAccessed 4 November 2026See in Sources8Source 8Helping consumers get better deals: statement on end-of-contract and annual best tariff notifications — Ofcom, 15 May 2019.www.ofcom.org.uk/__data/assets/pdf_file/0018/148140/statement-helping-consumers-get-better-deals.pdfAccessed 4 November 2026See in Sources}.
• Manage company phones with mobile device management such as Microsoft Intune, so a lost phone is a nuisance, not a data breach ^{11Source 11Enroll devices in Microsoft Intune (Android Enterprise) — Microsoft Learn, 2026.learn.microsoft.com/en-us/intune/device-enrollment/enroll-devicesAccessed 4 November 2026See in Sources13Source 13App protection policies overview — Microsoft Learn, 2026.learn.microsoft.com/en-us/intune/app-management/protection/overviewAccessed 4 November 2026See in Sources}.
• Under Cyber Essentials, phones that access company email or files must be supported, updated within 14 days for serious fixes, and locked with a PIN of six or more characters ^{17Source 17Cyber Essentials: requirements for IT infrastructure v3.3 — National Cyber Security Centre, April 2026.www.ncsc.gov.uk/sites/default/files/2026-08/IT%20Requirements%20v3.3.pdfAccessed 4 November 2026See in Sources}.

What do business SIM-only plans cost in 2026?

These are list prices read from the networks' business sites on 4 November 2026, all ex VAT on 24-month contracts. Offers change every few weeks, so treat them as a guide to the range rather than a quote.

For comparison, Ofcom found the average residential SIM-only customer paid around £18 a month in mid-2025 ^{19Source 19Pricing and consumer engagement: trends in the UK communications sector — Ofcom, 26 February 2026.www.ofcom.org.uk/siteassets/resources/documents/research-and-data/multi-sector/pricing/2025/pricing-and-consumer-engagement-report.pdfAccessed 4 November 2026See in Sources}. We found no reliable figure for what UK businesses pay per line, and no Northern Ireland-specific price survey, so these are UK-wide list prices.

What do business handset contracts cost?

A handset contract spreads the cost of the phone over the term. On EE's business site in November 2026, an iPhone 17 (256GB) with 50GB of data was £49 a month over 24 months with £8.33 upfront, or £57 with unlimited data, the same as a Samsung Galaxy S26 with unlimited data ^{4Source 4Apple iPhone 17 business plans — EE Business (prices ex VAT).business.ee.co.uk/phones/apple/iphone-17/Accessed 4 November 2026See in Sources5Source 5Samsung Galaxy S26 business plans — EE Business (prices ex VAT).business.ee.co.uk/phones/samsung/samsung-galaxy-s26/Accessed 4 November 2026See in Sources}. Stretching to 36 months brought both to £40 a month ^{4Source 4Apple iPhone 17 business plans — EE Business (prices ex VAT).business.ee.co.uk/phones/apple/iphone-17/Accessed 4 November 2026See in Sources5Source 5Samsung Galaxy S26 business plans — EE Business (prices ex VAT).business.ee.co.uk/phones/samsung/samsung-galaxy-s26/Accessed 4 November 2026See in Sources}, but you keep paying for a three-year-old phone. EE's handset plans also rise by £3 a month each 31 March ^{4Source 4Apple iPhone 17 business plans — EE Business (prices ex VAT).business.ee.co.uk/phones/apple/iphone-17/Accessed 4 November 2026See in Sources}.

The arithmetic is worth doing: compare the total over the term with buying the phone outright and adding a SIM-only plan. For staff who don't need a new flagship every two years, SIM-only with a phone you keep for three or four years is usually cheaper, as long as the phone is still receiving security updates.

What price rises are written into business contracts?

Since 17 January 2025, Ofcom has required providers to set out price rises "clearly in pounds and pence, before a customer signs up", instead of linking them to inflation ^{7Source 7Statement: prohibiting inflation-linked price rises — Ofcom, 19 July 2024.www.ofcom.org.uk/consultations-and-statements/category-1/review-of-inflation-linked-telecoms-price-risesAccessed 4 November 2026See in Sources}. Each network now writes a fixed amount into its contracts: EE adds £2.08 a month per plan every 31 March ^{1Source 1Business SIM only deals and contracts — EE Business (prices ex VAT).business.ee.co.uk/sim-only/Accessed 4 November 2026See in Sources}, Vodafone £2.09 a month a year ^{18Source 18Business Multibuy SIM terms — Vodafone UK.www.vodafone.co.uk/business/business-mobile-plans/multibuy-simAccessed 4 November 2026See in Sources}, and Three between 50p and £1.50 depending on the price ^{2Source 2Business SIM only deals — Three Business (prices ex VAT; offers 18 September to 11 November 2026).www.three.co.uk/business/simAccessed 4 November 2026See in Sources}. Over a 24-month contract with 15 lines, a £2.08 rise adds about £375 a year from the second year, before VAT.

The Ofcom protections apply to consumers and to micro and small businesses and not-for-profits with no more than ten people working for them, unless they expressly agree to waive them ^{7Source 7Statement: prohibiting inflation-linked price rises — Ofcom, 19 July 2024.www.ofcom.org.uk/consultations-and-statements/category-1/review-of-inflation-linked-telecoms-price-risesAccessed 4 November 2026See in Sources}. A firm with more staff should read its contract and contract summary closely, because the regulator's rules may not cover it.

How do you secure corporate mobiles?

A company phone holds email, files and passwords. Mobile device management (MDM) lets the business set a PIN, keep the phone updated and remove business data remotely. Microsoft Intune is the most common choice for businesses on Microsoft 365, and it is included in Microsoft 365 Business Premium, which lists at £16.90 per user per month on an annual commitment, ex VAT ^{14Source 14Microsoft 365 Business Premium — Microsoft UK (list price, annual commitment, ex VAT).www.microsoft.com/en-gb/microsoft-365/business/microsoft-365-business-premiumAccessed 4 November 2026See in Sources}. Intune handles the common cases ^{11Source 11Enroll devices in Microsoft Intune (Android Enterprise) — Microsoft Learn, 2026.learn.microsoft.com/en-us/intune/device-enrollment/enroll-devicesAccessed 4 November 2026See in Sources12Source 12Set up automated device enrollment for iOS/iPadOS — Microsoft Learn, 2026.learn.microsoft.com/en-us/intune/device-enrollment/apple/setup-automated-iosAccessed 4 November 2026See in Sources13Source 13App protection policies overview — Microsoft Learn, 2026.learn.microsoft.com/en-us/intune/app-management/protection/overviewAccessed 4 November 2026See in Sources}:

• Company-owned Android phones, either fully managed for work or with a separate work profile ^{11Source 11Enroll devices in Microsoft Intune (Android Enterprise) — Microsoft Learn, 2026.learn.microsoft.com/en-us/intune/device-enrollment/enroll-devicesAccessed 4 November 2026See in Sources}.
• Company-owned iPhones bought through Apple Business Manager, which enrol themselves and stay managed even after a reset ^{12Source 12Set up automated device enrollment for iOS/iPadOS — Microsoft Learn, 2026.learn.microsoft.com/en-us/intune/device-enrollment/apple/setup-automated-iosAccessed 4 November 2026See in Sources}.
• Personal phones (bring your own device), where app protection policies require a PIN for work apps, stop copying company data into personal apps, and can remove only the company data if someone leaves ^{13Source 13App protection policies overview — Microsoft Learn, 2026.learn.microsoft.com/en-us/intune/app-management/protection/overviewAccessed 4 November 2026See in Sources}.

Personal phones need a written policy as well as technology. The NCSC's guidance on bring your own device starts from the fact that "the device itself is the property of the user" and sets out the policy, cost and technical controls to decide on ^{16Source 16Bring your own device (BYOD) — National Cyber Security Centre, reviewed 13 May 2025.www.ncsc.gov.uk/collection/device-security-guidance/bring-your-own-deviceAccessed 4 November 2026See in Sources}. If you hold or are working towards Cyber Essentials, any phone that accesses company email or data is in scope: it must run a supported operating system, take high-risk updates within 14 days, and be locked with a biometric, password or PIN of at least six characters ^{17Source 17Cyber Essentials: requirements for IT infrastructure v3.3 — National Cyber Security Centre, April 2026.www.ncsc.gov.uk/sites/default/files/2026-08/IT%20Requirements%20v3.3.pdfAccessed 4 November 2026See in Sources}.

Should your business use eSIM?

An eSIM is a SIM built into the phone and set up by download rather than by inserting a card. For a business it removes the posting and swapping of SIM cards, and a replacement phone can be connected the same day. Most current phones support it. Apple's iPhone Air and iPhone Duo are eSIM-only everywhere, while other recent iPhones sold in the UK still have both an eSIM and a nano-SIM slot ^{15Source 15Learn which type of SIM your iPhone or iPad uses — Apple Support, 25 October 2026.support.apple.com/en-gb/118569Accessed 4 November 2026See in Sources}. Before you move, check that your network supports eSIM on business plans and agree who in the business can request a new eSIM profile, because whoever controls that can take over the number.

Do the 3G and landline switch-offs affect business mobiles?

Ofcom says the UK's 3G networks are now switched off, and 2G will follow, starting with EE from May 2029 and finishing by 2033 at the latest ^{9Source 93G and 2G switch-off — Ofcom, updated 10 August 2026.www.ofcom.org.uk/phones-and-broadband/coverage-and-speeds/3g-switch-offAccessed 4 November 2026See in Sources}. Very old phones, some vehicle trackers, lone-worker devices and alarm diallers relied on 3G or 2G, so check any device that has its own SIM. Separately, BT Group will retire the old landline network by 31 January 2027, and Openreach says alarms and payment terminals on those lines will need to be moved ^{10Source 10Time for a big switch up as PSTN switch-off looms — Openreach, 5 February 2026.www.openreach.com/news/time-for-a-big-switch-up-as-pstn-switch-off-looms/Accessed 4 November 2026See in Sources}. Ask each equipment supplier whether a digital line or a SIM-based unit is the right replacement.

What should you ask at renewal?

1. 1.How many lines do we pay for, and which have not been used in the last three months?
2. 2.What does each user actually use in data, and could most of the team move to a smaller plan?
3. 3.What is the fixed annual price rise, and on what date does it apply ^{7Source 7Statement: prohibiting inflation-linked price rises — Ofcom, 19 July 2024.www.ofcom.org.uk/consultations-and-statements/category-1/review-of-inflation-linked-telecoms-price-risesAccessed 4 November 2026See in Sources}?
4. 4.Are we being offered SIM-only, or is a handset cost hidden in a monthly price we have already paid off?
5. 5.Is there a pooled data or multi-line discount for our number of users?
6. 6.Which phones are no longer receiving security updates and need replacing first ^{17Source 17Cyber Essentials: requirements for IT infrastructure v3.3 — National Cyber Security Centre, April 2026.www.ncsc.gov.uk/sites/default/files/2026-08/IT%20Requirements%20v3.3.pdfAccessed 4 November 2026See in Sources}?
7. 7.Are all company phones enrolled in device management, and is the policy for personal phones written down ^{13Source 13App protection policies overview — Microsoft Learn, 2026.learn.microsoft.com/en-us/intune/app-management/protection/overviewAccessed 4 November 2026See in Sources16Source 16Bring your own device (BYOD) — National Cyber Security Centre, reviewed 13 May 2025.www.ncsc.gov.uk/collection/device-security-guidance/bring-your-own-deviceAccessed 4 November 2026See in Sources}?
8. 8.Will the network send the end-of-contract notice and best-tariff information Ofcom requires ^{8Source 8Helping consumers get better deals: statement on end-of-contract and annual best tariff notifications — Ofcom, 15 May 2019.www.ofcom.org.uk/__data/assets/pdf_file/0018/148140/statement-helping-consumers-get-better-deals.pdfAccessed 4 November 2026See in Sources}?

How does BTNI help with business mobiles?

Corporate mobiles are part of BTNI's Communications service alongside the phone system, for businesses in Lisburn, Belfast and across Northern Ireland: company phones enrolled in Intune, the office number on every mobile, and contracts reviewed before renewal. Our article on business phone system costs covers the desk-phone side.