· onsim · 2 min read
Receive landline calls on your mobile
Receive calls to your 020/01/02 UK landline number directly on your mobile natively, without apps or diverts
Yes — you can receive calls to your landline number on your mobile. With ONSIM, your landline number on your mobile is assigned directly to your SIM, so when someone calls your 020, 01 or 02 number, it rings your mobile like a normal call.
How it works
ONSIM works by assigning your landline number directly to your SIM at network level, so when someone calls it, it rings directly on your SIM. No apps or call forwarding required.
How to get started
1. Signup for an account
Signup for an account by clicking here. You can choose a new number or transfer in an existing number.
2. Install your SIM/eSIM
Install your ONSIM SIM in/on your device.
3. Make calls as normal
Your landline number is shown automatically as your caller ID to everyone you call.
Why this is better than call forwarding
- ❌ No reliance on call forwarding
- ❌ No delays or routing issues
- ❌ No hidden forwarding costs
- ❌ No dependency on broadband
- ✅ Calls delivered natively via SIM
- ✅ Instant ringing like a normal call
- ✅ Works anywhere with signal
- ✅ Fully mobile and portable
Who is this for?
Small businesses
Never miss a call while away from your desk.
Trades & field teams
Answer your business number anywhere.
Remote workers
No need for desk phones or fixed lines.
Landline replacement
Prepare for the UK PSTN switch-off.
Want to show your landline number when making calls too? 👉 Learn how outgoing caller ID works
FAQs
Frequently Asked Questions
Most common questions about receiving landline calls on a mobile
Can I keep my existing landline number?
Yes — you can port your existing number to ONSIM.
Do calls ring like a normal mobile call?
Yes — calls are delivered natively via the SIM, so your phone rings just like a standard mobile call.
Is this just call forwarding?
No — calls are delivered directly via the mobile network, not forwarded, which makes it more reliable and avoids delays.
Do I need an app?
No — calls are delivered natively via the SIM.
Do I need broadband or internet?
No — ONSIM works entirely over the mobile network, so no broadband or VoIP setup is required.
Can multiple phones ring at the same time?
Yes — ONSIM supports multi-user and team setups. Contact us to configure this.
Can I still use my desk phone?
Once your number is ported, calls will ring on your mobile instead of your old landline. Alternative setups are available if you need both.
Does this work abroad?
Yes — your landline number works wherever your SIM has coverage.
How long does it take to get set up?
You can start using a new number immediately. Porting an existing number typically takes a few working days.
- landline sim
- landline number