How does the SIM choose a network?

It evaluates signal strength on each available network and selects the strongest.

Does switching break calls or sessions?

Active TCP sessions survive; voice calls may briefly drop if signal cuts to nothing, but reconnect immediately.

Is it more expensive than single-network?

Yes, typically 10-20% uplift. Justified for any reliability-critical use case.

Can I get a static IP on multi-network?

Yes. Static IPs and private APNs work across network switches.

Is it available for staff phones?

Yes, but most staff phones don't need it - single-network on the right network is usually fine. We recommend multi-network primarily for M2M and field use.

What about international roaming?

Roaming uses each network's standard roaming agreements; we will model the cost upfront.

Business Mobile

Multi-Network SIMs

Single SIM, multiple networks - automatic switching for the strongest signal across EE, Vodafone, O2 and Three.

Book a consultation Talk to us

Overview

About multi-network sims

If signal coverage matters - and for field workers, fleet vehicles, alarms or anything outdoors it usually does - a single-network SIM is a gamble. Multi-network SIMs hold profiles for multiple UK networks and automatically pick the strongest at any given location.

Telappliant multi-network SIMs work across EE, Vodafone, O2 and Three. The SIM negotiates with whichever network has the best signal at that postcode and switches transparently if conditions change.

Use cases include field engineers travelling across patchy coverage, vehicle telematics that cross coverage boundaries, alarms and EV chargers in low-signal locations, and any device where downtime is more expensive than the slight uplift in SIM cost.

Management is the same as single-network SIMs - one portal, one bill, pooled data, spend caps. The multi-network capability is in the SIM itself; the management experience is identical.

Cost is modestly higher than single-network SIMs - typically 10-20% - but for any use case where reliability matters, the uplift is comfortably justified by avoided downtime.

Capabilities

What's included

The capabilities included as standard with this service.

EE, Vodafone, O2, Three

SIM profiles for major UK networks.

Automatic network selection

Strongest signal at any postcode.

Transparent switching

Active sessions survive network changes.

Pooled data

Single pool across all SIMs on the account.

Static IP option

For VPN and remote-access devices.

Diagnostics

Per-SIM network history and signal reporting.

Use cases

Where this fits

Common scenarios where this service delivers measurable value.

Field workforce

Engineers and technicians across patchy UK coverage.

Fleet telematics

Vehicles crossing coverage boundaries throughout the day.

Alarms and security

Always-on connectivity for monitored alarm panels.

EV chargers

Chargers in low-signal car parks and industrial estates.

FAQs

Common questions

Explore related services

M2M and IoT SIMs Business Mobile SIMs Business Mobile Emergency Broadband

Talk to us about multi-network sims

A short call, no obligation.