Traditional landlines tie you to a desk. Traditional mobiles tie you to a "07" number. OnSim’s Landline SIM gives you the best of both worlds: the professional identity of a local presence with the total freedom of a mobile network.
1. Your Landline... Anywhere!
Stop using clunky VoIP apps that drain your battery and drop calls.
Native Dialling: Make and receive calls using your business landline number (e.g., 01, 02, or 03) directly through your phone’s standard dialler.
No Apps Required: Because this works at the network level, you get the same reliability as a standard mobile call, even without a data connection.
2. Advanced Office Features on the Move
Being "mobile" no longer means having limited features. We’ve brought the power of an office phone system to your pocket:
Extensions: Assign short-dial extensions to your team.
Hold & Transfer: Professionally put callers on hold or transfer them to a colleague, just like a desk phone.
Call Recording: Automatically record every conversation for training or compliance (additional fees apply).
3. Built for Teams
OnSim is designed to grow with your business. Our network makes collaboration seamless:
Shared Numbers: You can share a single landline number across multiple SIMs.
Hunt Groups: Choose how calls are distributed—ring everyone at once or in a specific order until the call is answered.
Outbound Identity: Every team member can present the same professional business number when calling out.
4. Better Service & Support
We don't just provide the connection; we provide the peace of mind.
Reliable Infrastructure: Our service is powered by the UK’s leading network, ensuring maximum coverage.
UK-Based Experts: Forget waiting in long call-centre queues. You get direct access to our dedicated UK support teams who understand your business needs.
Summary: The OnSim Advantage
| Feature | Standard Mobile | Traditional Landline | OnSim Landline SIM |
|---|---|---|---|
| Professional Number | ❌ (07 only) | ✅ | ✅ |
| Mobility | ✅ | ❌ | ✅ |
| Hold/Transfer/Extensions | ❌ | ✅ | ✅ |
| No Data/Wi-Fi Needed | ✅ | ❌ | ✅ |
How to Get Started
If you already have a landline number, we can port it over for you. If you need a new one, we can provide numbers for any UK area code instantly.