The UK’s traditional copper phone network (PSTN) is being permanently switched off by January 31, 2027. This means traditional landlines will stop working, and most providers are forcing customers onto internet-based "VoIP" systems like BT Digital Voice.
ONSIM Landline Replacement is the simple, stress-free alternative that keeps your home phone working without needing a broadband connection.
If you want to keep your landline but don't want the hassle of new broadband, internet routers, or unreliable VoIP apps, ONSIM is the perfect solution.
The Better Alternative to "Digital Voice"
Most providers require you to have a broadband line to keep your home phone. ONSIM uses the mobile network to power your home phone, meaning you get a dedicated connection that doesn’t rely on your internet speed.
Key Benefits
Keep Your Phone: There is no need to buy new equipment. You can keep using the telephone handset you already know and trust.
Keep Your Number: Family, friends, and doctors will continue to call you on the exact same number you've had for years.
No Broadband Required: Perfect for households that don’t have (or don’t want) internet. It works independently of any computer or Wi-Fi setup.
Reliable Quality: Unlike VoIP, which can "stutter" if your internet is slow, ONSIM uses the native mobile voice network for crystal-clear, dependable calls.
🛠️ How Simple Is the Setup?
You don't need an engineer or any technical skills. Setting up takes less than two minutes:
Unplug: Remove your existing phone cable from the old BT wall socket.
Plug In: Plug that same cable into the back of the ONSIM Landline Replacement Box.
Power On: Connect the ONSIM box to a standard power outlet.
Done: Your phone will now have a dial tone and is ready to use!
🚀 Ready to Switch?
The PSTN switch-off is already happening region-by-region across the UK. Don't wait until your line is disconnected.
To join the waitlist for this service, enter your email address here.
If you require more information:
Email our team: support@onsim.uk
Call us: 0333 880 4008