On 31 January 2027, the UK's analogue phone network is being permanently switched off. If your business uses a traditional landline, you need to switch before the deadline. Mobex brings voice, mobile, and messaging onto one system, so you can move with one switch and keep your numbers.
Our solutions are crafted to enhance the efficiency of your operations and significantly reduce your communication costs.
BT Openreach is decommissioning the Public Switched Telephone Network (PSTN) and ISDN, the technology behind every traditional UK landline. They are being replaced with digital phone services delivered over broadband.
The deadline was extended from December 2025 to give vulnerable users and critical line dependencies more time to migrate. There will not be a further extension.
Traditional landlines, ISDN lines, and on-premises phone systems all need to migrate. Anything else using the analogue line, alarms, lifts, payment terminals, fax machines, also needs to be checked.
Yes. If your business already uses Microsoft 365, Microsoft Teams can replace your entire phone system. Most UK businesses use Teams every day for chat and meetings without realising it can also handle every business call. There's no new app to install, and no second platform to learn. For most Microsoft 365 customers, this is the simplest path off the old phone network.
A modern business phone system that runs over your broadband. Desk phones, softphone apps, and full call control, with all your existing numbers ported across.
Best for: businesses that want a like-for-like landline replacement, with proper call routing and reception features.
Turn Microsoft Teams into your phone system. Make and take business calls in the app your team already uses every day. No new software for staff to learn.
Best for: businesses already on Microsoft 365. The simplest path off the old network for most companies.
Dual eSIM business mobile. Work and personal lines on one device, with business numbers, business texting, and full mobile control from day one.
Best for: businesses that work on the go. Property, estate agents, field services, anyone not tied to a desk.
Use your business numbers for every customer conversation — not personal mobiles.
Work from any device. Run your business line on a SIM, a softphone, or both.
Customer conversations belong to your business. Not the phone in someone's pocket.
One provider. Voice, mobile, and messaging in one system.
WhatsApp under control. Customer chats stay with the business.
One messaging system across every site. Tenants reach the right team.
Patient conversations stay with the practice. Continuity always.
Microsoft Teams calling, multi-site campuses, term-time peaks.
Client comms you can audit. Hybrid working, full oversight.
Tell us a few things about your setup and we'll put together a tailored quote covering voice, mobile, and messaging.
No obligation, no hard sell.
✔ Quote within 1 working day
✔ Side-by-side comparison with your current spend
✔ UK-based switch-off specialist, not a call centre
✔ Keep your existing numbers
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