Number Porting for Business: Will I Lose My Numbers When Switching?

Last updated: March 2026  |  Reviewed by: Connection Technologies team

Direct Answer: No, You Keep Your Numbers

UK SMEs deserve technology partners who are transparent about pricing, honest about capabilities and accountable when things go wrong. Too many telecoms and IT providers hide behind call centres, bury fees in small print and lock businesses into inflexible contracts.

Connection Technologies takes a different approach. We provide business mobiles, VoIP phone systems, broadband, IT support and cyber security under one roof, with a named UK-based account manager for every client. No overseas call centres, no hidden fees, no nasty surprises.

We are usually best for SMEs with 10–250 staff who are tired of juggling multiple providers and want one accountable partner they can trust.

How Number Porting Works

Here is a step-by-step guide to the typical process:

Step 1: Discovery and audit — your provider should conduct a thorough audit of your current setup, including infrastructure, software, security posture and pain points. This typically takes 1–2 weeks and should be free of charge.

Step 2: Solution design — based on the audit, your provider designs a solution tailored to your business needs, size and budget. This should include a detailed service specification, pricing breakdown and implementation timeline.

Step 3: Agreement and planning — once you approve the solution, your provider creates a detailed implementation plan with milestones, responsibilities and a communication schedule. This is also when contracts are signed.

Step 4: Implementation — the actual migration or setup, typically conducted in phases to minimise disruption. Critical systems are migrated during off-peak hours, and your provider should have a rollback plan for every change.

Step 5: Testing and handover — thorough testing of all systems before going live, followed by user training and documentation. Your provider should be available for intensive support during the first 2–4 weeks.

Step 6: Ongoing management — regular service reviews (monthly or quarterly), proactive monitoring, continuous improvement and strategic planning. This is where the real value of a managed service becomes apparent.

Connection Technologies follows this exact process for every new client, with a named project manager overseeing the transition and a named account manager for ongoing support.

Timeline by Number Type

Here is a step-by-step guide to the typical process:

Step 1: Discovery and audit — your provider should conduct a thorough audit of your current setup, including infrastructure, software, security posture and pain points. This typically takes 1–2 weeks and should be free of charge.

Step 2: Solution design — based on the audit, your provider designs a solution tailored to your business needs, size and budget. This should include a detailed service specification, pricing breakdown and implementation timeline.

Step 3: Agreement and planning — once you approve the solution, your provider creates a detailed implementation plan with milestones, responsibilities and a communication schedule. This is also when contracts are signed.

Step 4: Implementation — the actual migration or setup, typically conducted in phases to minimise disruption. Critical systems are migrated during off-peak hours, and your provider should have a rollback plan for every change.

Step 5: Testing and handover — thorough testing of all systems before going live, followed by user training and documentation. Your provider should be available for intensive support during the first 2–4 weeks.

Step 6: Ongoing management — regular service reviews (monthly or quarterly), proactive monitoring, continuous improvement and strategic planning. This is where the real value of a managed service becomes apparent.

Connection Technologies follows this exact process for every new client, with a named project manager overseeing the transition and a named account manager for ongoing support.

Landline vs Mobile vs VoIP Porting

Remote and hybrid working is now the norm for UK businesses, and your technology must support it seamlessly:

Cloud-based phone systems are essential for remote teams. Staff should be able to make and receive business calls from anywhere using a mobile app or softphone, with the same features (call recording, transfer, voicemail) as they would have in the office.

Business mobiles with MDM (Mobile Device Management) ensure company data is protected on employee devices, whether company-owned or BYOD. MDM allows remote wiping, app management, security policy enforcement and separation of personal and business data.

Secure remote access through VPN or zero-trust network access (ZTNA) ensures employees can safely access company resources from any location. In 2026, ZTNA is increasingly preferred over traditional VPN for its granular access controls.

Collaboration tools including Microsoft Teams, video conferencing and shared document platforms keep remote teams connected and productive. Your IT provider should manage and optimise these tools as part of the service.

Endpoint security is even more critical for remote workers, who may be connecting from home networks, coffee shops or co-working spaces. Every device needs endpoint protection, encryption and regular patching regardless of location.

Connection Technologies provides a complete remote working solution: Hypercloud VoIP with mobile app, business mobiles with MDM, secure connectivity and managed endpoint security — all from a single provider.

What Can Go Wrong (and How to Prevent It)

Here is a step-by-step guide to the typical process:

Step 1: Discovery and audit — your provider should conduct a thorough audit of your current setup, including infrastructure, software, security posture and pain points. This typically takes 1–2 weeks and should be free of charge.

Step 2: Solution design — based on the audit, your provider designs a solution tailored to your business needs, size and budget. This should include a detailed service specification, pricing breakdown and implementation timeline.

Step 3: Agreement and planning — once you approve the solution, your provider creates a detailed implementation plan with milestones, responsibilities and a communication schedule. This is also when contracts are signed.

Step 4: Implementation — the actual migration or setup, typically conducted in phases to minimise disruption. Critical systems are migrated during off-peak hours, and your provider should have a rollback plan for every change.

Step 5: Testing and handover — thorough testing of all systems before going live, followed by user training and documentation. Your provider should be available for intensive support during the first 2–4 weeks.

Step 6: Ongoing management — regular service reviews (monthly or quarterly), proactive monitoring, continuous improvement and strategic planning. This is where the real value of a managed service becomes apparent.

Connection Technologies follows this exact process for every new client, with a named project manager overseeing the transition and a named account manager for ongoing support.

Porting Checklist

Choosing the right provider is a decision that will affect your business for years. Here is a practical framework based on what actually matters:

1. Check response time SLAs. Ask for the provider’s average response time over the past 12 months, not just the SLA target. A good provider should respond to critical issues within 15 minutes and resolve standard requests within 4 hours.

2. Ask about account management. Will you have a named account manager who knows your business, or will you be calling a generic helpdesk? For SMEs, having someone who understands your setup makes a significant difference to service quality.

3. Understand the contract terms. What is the minimum term? What happens if you need to leave early? Are there RPI-linked price increases? What is the notice period? Get all of this in writing before signing.

4. Verify security credentials. At minimum, your provider should hold Cyber Essentials certification. For regulated industries, look for ISO 27001 or sector-specific accreditations.

5. Request references. Ask for references from businesses similar to yours in size and industry. A good provider will be happy to connect you with existing clients.

6. Test the support experience. Before signing, call the support line and see how long it takes to reach a real person. This tells you more about the provider than any sales presentation.

Connection Technologies welcomes this level of scrutiny. We publish our SLA performance, provide named account managers for every client and offer flexible contract terms with no hidden costs.

Frequently Asked Questions

What are RPI price increases in telecoms contracts?

RPI (Retail Price Index) increases are annual price rises built into many UK telecoms contracts. They allow the provider to increase your bill by the current RPI rate (typically 5–8%) every year. Over a 3-year contract, this can add 15–25% to your total cost. Connection Technologies does not apply RPI increases.

How much does it cost to leave a telecoms contract early?

Early termination fees vary by provider. Some charge 100% of the remaining contract value, which can be tens of thousands of pounds. Others cap exit fees or offer buy-out options. Always check the exit terms before signing. Connection Technologies caps exit fees and states them clearly upfront.

Will I lose my phone numbers if I switch provider?

No. Number porting allows you to keep all your existing phone numbers when switching providers. The process takes 5–10 working days for landlines and 1–3 working days for mobiles, with success rates exceeding 99.5% in the UK.

What is an auto-renewal clause?

An auto-renewal clause automatically extends your contract for another term (often 12–36 months) if you do not give notice within a specific window (typically 90 days before expiry). This can trap you in a contract you no longer want. Always check for auto-renewal terms and set calendar reminders.

How do I know if my telecoms provider is overcharging me?

Common signs include: bills that increase every year (RPI rises), charges for services you did not order, out-of-bundle fees you were not warned about, and difficulty getting a clear answer on total costs. Request an independent bill audit — Connection Technologies offers free bill reviews for prospective clients.

What should a fair telecoms contract look like?

A fair contract includes: fixed pricing for the full term, clear exit terms with capped fees, no auto-renewal into new long-term commitments, transparent billing with itemised invoices, and reasonable notice periods (30–90 days). Connection Technologies’ contracts meet all of these criteria.