Which SIM do I need?
GSM Talk Intercom SIM
For
Intercoms that call your phone like a normal mobile call to have a 2-way conversation.
Not for
App-based, 2-way video, IP or data-only intercoms.
Not for residential complexes or large commercial sites.
Visitors press your intercom, your phone rings like a normal call and you answer it to talk
- Unlimited calls, SMS and GSM intercom data
- 4-network Smart-Switching: EE, O2, Three and Vodafone
- UK support from entry-system specialists
GSM Dial-to-Open SIM
For
Make a Call, it rings and immediately hangs-up to trigger entry system to open.
Not for
Two-way conversations with visitors or app-based 2-way video / data-only intercoms.
Not for residential complexes or large commercial sites.
Call the gate from your phone to open it, like using your mobile as a remote.
- Unlimited gate opening from authorised phones
- 4-network Smart-Switching: EE, O2, Three and Vodafone
- UK support from entry-system specialists
Data-Only Intercom SIM
For
App-based video intercoms that require video like a FaceTime call.
Not for
Intercoms that simply call your phone like a cellular gsm mobile call.
Not for residential complexes or large commercial sites.
Your intercom uses an app, video call, cloud service or relies only on data, like a FaceTime call.
- Unlimited data for app, video and cloud intercoms
- Fixed O2 or Vodafone network, chosen during setup
- UK support from entry-system specialists
*Fair usage policy applies. GSM plans use AI Smart-Switching across EE, O2, Three and Vodafone. The Data-Only Intercom SIM is fixed to a single network (O2 or Vodafone, selected at setup) and does not use AI multi-network switching. LynixSIM plans are designed exclusively for gate and intercom systems and are not intended for general mobile use. Each SIM is for one single private residence or self-contained dwelling only. Blocks of flats, housing estates, mixed-use developments and commercial or multi-occupancy sites require a separate commercial agreement. Please refer to our Terms & Conditions for full details.
Are you a gate or intercom installer?
Join our network of nationwide UK installers earning recurring revenue on every SIM they fit. Trade pricing, pre-activated stock, and a dedicated mobile app.
Why LynixSIM?
"LynixSim was exactly what I needed for my gate system. Works flawlessly and the signal is rock solid."
— David Thompson, Verified Customer
50+ Systems Tested
Many more leading brands supported
Best Signal, Any Network
Our AI model selects the best UK signal from EE, O2, Vodafone or Three.
Pre-Activated
SIMs arrive ready to use — no complicated setup required.
50+ Systems Tested
Guaranteed compatibility with major intercom brands.
Frequently Asked Questions
How quickly can I get started?
Order your Lynix SIM, receive and fit the SIM, your installer programs the intercom — often up and running the same day.
Which network should I choose?
Our SIM connects to the strongest available network at the gate location, helping deliver reliable operation even where coverage is patchy.
Is there a contract?
30-day rolling contract, billed monthly in advance. Cancel any time with 30 days' notice.
Choose Your Network
Or let our AI pick the strongest signal automatically