Compatibility check
Will It Work With My Phone?
Find out before you commit to anything.
1. Is Your Network Supported?
The 4G upgrade in 2025 had an unintended consequence — it broke call forwarding, a feature that had worked reliably on mobile networks for decades. Every carrier was affected. Each then made their own decision on how to respond, which is why the picture is an absolute maze today.
If you're on one of the networks below, call forwarding is not currently available and Guardian Dial won't be able to route your calls:
Tesco Mobile · 1pMobile · Lycamobile · VOXI · ASDA Mobile · Co-op Mobile
On one of these networks? Text PAC to 65075 free from your phone — this is an Ofcom-regulated process that lets you move your existing business number to a supported network. Before you do, text INFO to 85075 — also free — to check what charges apply to leaving your contract. On a rolling monthly plan, there's usually nothing to pay. Mid-contract, early termination charges may apply.
2. Contact Your Carrier to Enable Call Forwarding
Most supported networks need to switch call forwarding on for you — it's a one-time call or chat, and usually done within 24 hours.
| Carrier | How to reach them |
|---|---|
| O2 | Call 202 |
| EE | Call 150 |
| Vodafone | Call 191 |
| Three | Call 333 |
| Sky Mobile | Call 150 |
| SMARTY | App or website chat |
| iD Mobile | App or website |
| Talkmobile | Website chat |
| giffgaff | App or website chat |
On a different network? Check with your carrier's customer service to see if they offer call forwarding / call divert.
3. Getting Set Up
Some carriers need a destination number before they can enable forwarding. You get that number the moment you join Guardian Dial — so joining is the first step, not jumping the gun.
Here's exactly what happens:
| Step | What happens |
|---|---|
| 1. Join Guardian Dial | Choose your AI voice, your script comes pre-filled for your trade and ready to use — personalise it to suit your business, and connect your calendar. You'll get your own dedicated Guardian Dial number as part of setup — this is the number your carrier needs. |
| 2. Everything is saved | Your AI agent, your script, your calendar connection and your number are all securely saved — nothing is lost, nothing needs redoing. |
| 3. Give your number to your carrier | Contact your carrier and ask them to enable conditional call forwarding to your Guardian Dial number — for no reply, busy, and unreachable. Ask them to set it to answer on the fourth ring so your phone rings first. |
| 4. Usually done within 24 hours | Most carriers sort this within a day. We build in a 5-day grace period so there's no pressure while it's arranged. |
| 5. Carrier confirms it's done | Go to guardiandial.com, select Client Office, and log in. |
| 6. Check if I'm Live | You'll land straight on your Activation page — just tap "Check if I'm Live." |
| 7. You're Live | You now have the keys to your own online office and an active AI receptionist, ready to take every call. You'll also receive a welcome pack with everything you need to get started. |
Top Tip: ask your carrier to set up conditional call forwarding to answer on the fourth ring. This way your phone still rings first — giving you the chance to answer if you want to — and your AI Receptionist only picks up when you don't. You can leave it on 24/7 and take calls yourself whenever you choose.
Disclaimer: This information is correct at the time of publishing, but it is best to check with your carrier in the first instance.
Still stuck? Email [email protected] and we'll help you sort it.