OnSim doesn't just give you a mobile connection; we put a full-featured office phone system in your pocket. Whether you are on the road, on-site, or working from home, you have access to the same professional tools as a high-end desk phone—with the added benefit of total mobility.
Enterprise Features in Your Pocket
Experience everything your fixed-line or VoIP system can do, delivered natively to your mobile device.
📟 Landline Caller ID
Maintain your professional identity no matter where you are. When you call a client from your mobile, their screen will show your business landline number (e.g., 01, 02, or 03), not your personal 07 mobile digits.
📞 Professional Call Transfer
Never tell a customer "I'll have to call you back from the office." You can transfer live calls from your mobile to any other mobile or landline extension instantly, ensuring a seamless experience for your clients.
👥 Smart Hunt Groups
Ensure no lead goes unanswered. You can set up Hunt Groups to ring multiple OnSim devices simultaneously. The first person to pick up takes the call.
Note: This requires 2+ users and a shared business number.
🏢 Pair with a Deskphone
Do you still prefer a physical phone when you're at your desk? You can pair an IP Deskphone with your OnSim SIM. When someone calls your number, both your desk phone and your mobile will ring at the same time. Pick up whichever is most convenient.
⏺️ Network-Level Call Recording
Stay compliant and maintain records without bulky apps or hardware. We record your calls directly on the network, providing high-quality audio files accessible via your dashboard.
Note: Additional monthly fees apply for recording services.
Why This Beats Traditional VoIP Apps
| Feature | VoIP Apps (e.g., Skype/Teams) | OnSim Landline SIM |
|---|---|---|
| Call Quality | Dependent on high-speed data/Wi-Fi. | Uses the standard voice network. |
| Battery Life | Drains battery with background apps. | Zero extra battery drain (native). |
| Ease of Use | Must open an app to dial. | Use your standard phone keypad. |
| Reliability | Calls often drop when switching signals. | Seamless coverage via UK's leading network. |
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.