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Keep Your Landline Number on Your Mobile

Get a low-cost Virtual Landline for £5/month + VAT. Forward landline calls to your mobile now, upgrade to a Landline SIM if you want outbound calls from your landline number.

Keep your landline number on mobile with ONSIM

The Fastest Way to Move Your Landline Number to Mobile

Read on if you want to keep your landline number, transfer landline to mobile, or set up landline forwarding to mobile. No apps. No VoIP setup. Just simple forwarding at £5/mo.

Keep Your Landline Number

If your goal is to "keep my landline number" our experienced team can help you port your existing number from your current provider (BT, Virgin, Sky, Talktalk and more).

Divert Landline to Mobile

Set call forwarding so your landline number rings on your current mobile phone. You keep using your existing mobile phone as normal.

Landline forwarding to mobile with ONSIM virtual landline
Business Landline on Mobile

Perfect for sole traders and small teams that need a professional, low cost business landline on mobile identity without office hardware or long contracts.

Upgrade to Landline SIM

Start with low-cost forwarding, then upgrade to our Landline SIM for outbound calls from your landline number if required.

6,500+

Customers

Forwarding now. Landline SIM later.

Start with the £5/mo forwarding-only option to keep costs low, prove demand, and go live fast. When you are ready, upgrade to Landline SIM to make outbound calls from your landline number.

Step 1: Start simple

Virtual Landline (Forwarding Only)

£5/mo + VAT

  • Keep your landline number on your mobile
  • Divert landline calls to your existing mobile
  • No apps, no VoIP setup
Start for £5/mo

Step 2: Outbound Calls

Upgrade to Landline SIM

After onboarding, move from forwarding to a full mobile landline setup with more control and outbound caller ID from your landline number.

  • Show landline caller ID on outbound calls
  • More advanced business call handling
  • Smooth upgrade from your existing account
See Landline SIM

FAQs

Frequently Asked Questions

Everything you need to know to keep your landline number on your mobile.

Can I keep my landline number?

Yes. You can transfer (port) your existing landline number, or start with a new one and transfer later.

How do I keep landline number on mobile?

We provide a virtual landline and forward incoming calls to your mobile. This is the simplest way to use landline number on mobile.

Can I transfer landline to mobile and still look professional?

Yes. Customers still dial your landline number while you answer on your mobile, so your business keeps a trusted local presence.

Is this just landline forwarding to mobile?

The starter plan is call forwarding only at £5/mo + VAT. Once onboarded, you can upgrade to Landline SIM for extra features and to display your landline as your caller ID from your mobile on outbound calls.

Can I port landline to mobile phone for business use?

Yes. This service is designed for business landline on mobile use cases, including sole traders and growing teams.

What happens after I start on forwarding?

You can keep forwarding only, or upgrade later to ONSIM Landline SIM to make outbound calls displaying your landline number.

Keep your landline number on mobile today

Landline Call forwarding for £5/mo + VAT.

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