Changing phone providers has a reputation for being risky. It’s not, particularly, but it’s unforgiving of poor sequencing. Cancel before you port and you can lose a number you’ve advertised for fifteen years. Cut over on a Friday afternoon and you’ll discover the after-hours routing is wrong at the worst possible moment.
This checklist is ordered deliberately. Work through it in sequence.
1. Good and Bad Reasons to Switch
| Good Reasons | Weak Reasons |
|---|---|
| Your service is being decommissioned (ISDN/PSTN) | A slightly cheaper headline rate |
| You’re paying above market for a basic feature set | One bad support experience |
| You need features the platform can’t provide (mobile apps, AI, CRM) | A cold call offering "savings" |
| Support is offshore, slow, or unavailable when you need it | A feature you would use twice a year |
| Your team has moved to hybrid or multi-site working | Because the contract is up and it feels like time |
| Your data needs to stay in Australia and currently does not |
Before switching, it’s always worth ringing your current provider's retention team with a competing quote. Sometimes you’ll get the outcome you wanted without a migration. If the answer is "that's the best we can do", you’ve lost nothing and gained certainty.
2. Phase 1: Audit What You Have
- Collect three months of invoices. Not one, three, so seasonal charges show up.
- List every number. Main lines, DID ranges, 1300/1800, fax, alarm lines, and any number you’ve forgotten but still appears on the bill.
- List every user and device. Who has a desk phone, who uses an app, who needs a DID of their own.
- Document your call flows. Draw them. Who answers first, what happens after 20 seconds, what happens at 5pm, what happens on a public holiday.
- Identify non-voice devices on phone lines: EFTPOS, alarm, lift phone, fire panel, gate intercom. See our ISDN migration guide for the full list.
- Note your call volumes: peak concurrency, total minutes, and international destinations.
- Record what you actually use. Most businesses pay for features nobody has touched in two years; equally, most have a workaround in place for a feature they never knew was available.
Key takeaway: The audit is the part that can’t be rushed and can’t be delegated to the incoming provider. Everything else is process; this is knowledge only your business has.
3. Phase 2: Check Your Exit Position
- Find the contract end date and whether it auto-renews. Diarise the notice window immediately.
- Calculate the early termination charge if you leave now. Ask for it in writing. The figure quoted verbally is often wrong.
- Check hardware ownership. If handsets are rented or financed, you may need to return them or pay them out. Locked handsets can’t be reused.
- Confirm number ownership. Particularly for 1300/1800 numbers, verify whether you hold the rights or are renting the number from the provider. This is the single most important question in the entire exit review.
- Check for bundling. If phones are bundled with internet or mobile services, removing one may reprice the others.
- Get your data out. Export call recordings, voicemail greetings, contact directories, and historical reporting before you cancel. Access usually ends at disconnection.
Where the exit fee is significant, do the arithmetic honestly: an early termination charge of AUD $2,000 against savings of AUD $600 a month pays for itself in under four months. Waiting out a contract to avoid a fee is often the more expensive choice.
4. Phase 3: Shortlist and Compare Properly
- Write your requirements first: a single page listing must-haves, nice-to-haves, and deal-breakers. Do this before you talk to any salesperson, or their feature list will become your requirements.
- Get three written quotes against that same page.
- Price the total, not the seat. Include setup, porting, hardware, call charges, recording storage, integrations, and AI. Our pricing guide lists the fourteen line items to ask about.
- Test support before signing. Ring the support line at 4:45pm on a weekday. Time the answer. Ask a technical question. This tells you more than any SLA document.
- Ask where the data lives and whether support is Australian-based.
- Check the contract term and exit terms you’re agreeing to: you are, after all, currently living through someone else's.
- Request a trial or pilot. Even two licences on a spare number for a fortnight will surface problems no demo shows.
- Take up a price-beat guarantee if one is offered, using your best competing written quote.
The reference call worth making
Ask each shortlisted provider for a reference customer of similar size in a similar industry, and actually ring them. Ask one question: "What went wrong during your migration, and how did they handle it?" Every migration has something go wrong. The answer tells you what you need to know.
5. Phase 4: Build and Test Before You Move
- Build the new system on temporary numbers while the old one still runs. Nothing should be configured for the first time on cutover day.
- Recreate your call flows from the diagrams in Phase 1 and improve them while you’re there. Most businesses are carrying routing decisions made a decade ago.
- Record fresh greetings and prompts. Use a consistent Australian voice for all of them.
- Prepare the network: QoS, SIP ALG disabled, PoE ports available, voice VLAN if applicable. See the call quality guide.
- Lodge the port request early with pre-validated account details. See the porting guide.
- Test every path: business hours, after hours, holiday, overflow, voicemail, transfer to mobile, and the emergency fallback.
- Train the team in a 30-minute session, and record it for anyone on leave.
- Write the rollback plan. One page: who to call, what to change, how long it takes.
6. Phase 5: Cutover Day
- Schedule it for a Tuesday or Wednesday morning. Never a Friday, never before a public holiday, never during your peak season.
- Confirm the port window with both providers the day before.
- Have a named contact at the new provider available for the whole day, with their direct number.
- Keep the old phones live and answered through the transition period.
- Test immediately after cutover: ring the main number from a mobile on a different carrier, from a landline, and from within the office. Test every DID and every menu option.
- Publish a temporary mobile number on your website and Google Business Profile for the day as a safety net.
- Tell your team what is happening and who to report problems to. One person collects issues; everyone else keeps working.
- Don’t cancel the old service today. Confirm the port is complete first.
7. Phase 6: The First 30 Days
- Day 1–3: review call logs daily for calls landing in unexpected places or dropping to voicemail.
- Day 3: verify every non-voice device again, alarm, lift phone, EFTPOS, with their monitoring providers.
- Week 1: collect staff feedback and fix the small irritations before they harden into workarounds.
- Week 2: confirm the port has fully completed and then cancel the old service in writing, keeping the confirmation.
- Week 2: update your phone number everywhere it appears if anything has changed: website, Google Business Profile, email signatures, invoices, vehicle signage, directories.
- Week 3: switch on the features you deferred: CRM integration, call recording, AI summaries.
- Week 4: check the first invoice line by line against the quote. Query anything unexpected immediately, while the sales conversation is still fresh.
- Week 4: confirm the old provider has stopped billing. Watch for a final invoice with charges you didn’t expect.
Key takeaway: Two things go wrong after most migrations: an old service that keeps billing, and a non-voice device nobody retested. Both are on this list. Neither takes more than ten minutes to check.
8. The One-Page Checklist
- Collect three months of invoices
- List every number, user, device and call flow
- Identify non-voice devices on phone lines
- Find your contract end date and exit fee
- Confirm who owns your 1300/1800 numbers
- Export recordings, greetings and directories
- Write a one-page requirements list
- Get three written quotes on total cost
- Test each provider's support line before signing
- Build and test the new system on temporary numbers
- Prepare the network (QoS, SIP ALG off, PoE)
- Lodge the port request with validated details
- Train the team and write a rollback plan
- Cut over on a Tuesday or Wednesday morning
- Test every number and path immediately
- Retest alarms, lifts and EFTPOS
- Confirm port completion, then cancel in writing
- Update your number everywhere it’s published
- Check the first invoice against the quote
- Confirm the old provider has stopped billing
Providers that include free setup and free number porting remove the largest one-off costs from this process and generally handle steps 12 and 14–17 with you rather than leaving them on your desk. Uniden Voice over Cloud includes both as standard on all plans, with an Australian team managing the cutover, which is why it tops our 2026 comparison for businesses making the move.