Siftpick

How to switch your business phone system

Moving to a cloud phone system sounds risky: what if you lose your numbers or drop calls during the change? Done in the right order, it is routine. Here is the sequence we recommend, and how to pick the provider that actually fits your team.

1. Audit what you have today

List every phone number, who uses it, and which are mission-critical (main line, sales, support). Note your contract end date and any early-termination fee. This is the inventory you will port.

2. Confirm your numbers can be ported

Almost all US local and toll-free numbers can be ported to a cloud provider, but timing varies (a few business days for local, longer for toll-free). Keep your old service active until the port completes, never cancel first.

3. Decide the features you actually need

Call queues and an auto-attendant (IVR) for teams, SMS for customer-facing lines, call recording where compliance requires it, and CRM integration if reps live in a CRM. Pay for what you will use, not the longest feature list.

4. Size it for your team and budget

Pricing is per user, per month, so the real number is seats × price × the length of your commitment. A cheaper per-seat plan is not always cheaper once you add the seats you need.

5. Shortlist with the comparator

Enter your seats, budget per user, the numbers to port and your must-have features. You get a ranked shortlist with a transparent score and any deal-breakers called out.

6. Port, test, then cut over

Set up the new system in parallel, submit the port request, and test calls, texts, voicemail and your auto-attendant before the switch. Cut over outside business hours and keep the old line reachable for a short overlap.

Ready to see options? Browse the best business phone systems, or get a ranked shortlist for your team.

Frequently asked questions

Will I lose my phone number when I switch?
No. Your numbers are ported to the new provider. Keep the old service active until the port is confirmed complete, and you keep every number.
How long does porting a number take?
Local US numbers usually port within a few business days; toll-free numbers can take longer. Your new provider manages the request once you submit a recent bill and authorization.
How much does a cloud phone system cost?
Most business plans run roughly $10 to $30 per user per month. Because it is per user, multiply by your number of seats and your commitment length to see the real cost.
Can I keep working during the switch?
Yes. Set the new system up in parallel and test it before the port. Cut over outside business hours and keep a short overlap so no calls are missed.