How a fast-growing Manchester-based DOOH specialist eliminated connectivity issues across its nationwide digital advertising estate by migrating to KeySIM multi-network IoT SIM cards and Teltonika industrial routers.
Crystal Clear Media is a Manchester-based digital out-of-home (DOOH) specialist operating large-format digital advertising screens across the UK. The company delivers dynamic advertising content for a wide range of customers, with reliable connectivity forming a critical part of the operation — allowing content to be updated remotely and ensuring campaigns remain live and accurate at all times.
The business is in a major growth phase following its acquisition of Mass Media Outdoor Ltd, which added around 80 additional digital screens to the company's expanding UK footprint, including premium locations across Manchester and along the M25 corridor. This rapid expansion made resilient, scalable connectivity more important than ever.
As Crystal Clear Media's screen estate rapidly expanded, the limitations of traditional single-network SIM cards became increasingly apparent. Some screen locations experienced inconsistent coverage and network reliability issues — creating operational challenges when remotely managing content updates across multiple regions.
Digital advertising screens depend on connectivity for everything. Content must be updated quickly and consistently to keep campaigns accurate, and any connectivity issue directly affects service quality for clients. With screens spread across locations as varied as Manchester city centre and the M25 corridor, the performance of any single mobile operator was unpredictable.
A single-network SIM offers no fallback: if that operator has coverage gaps, congestion, or service issues at a specific location, the screen loses connectivity with no alternative available. As the estate grew, so did the frequency and geographic spread of these problems.
Crystal Clear Media migrated its SIM card estate to KeySIM's multi-network IoT SIM platform, combining KeySIM SIM cards with Teltonika industrial routers at each screen installation. This allows each screen to automatically connect to the strongest available mobile network signal in its area — removing dependence on any single operator.
Following the full rollout, Crystal Clear Media gained access to multiple UK mobile networks through a single SIM across the nationwide estate. The connectivity issues previously encountered have been eliminated since completing the migration.
Through KeySIM's partnership with Solwise, customers can also procure pre-configured Teltonika routers with KeySIM multi-network SIM cards already installed — simplifying deployment and reducing installation time for large-scale projects.
Vodafone, O2, EE and Three on one SIM — automatic fallback across the entire estate.
Industrial-grade hardware paired with KeySIM SIMs for resilient screen connectivity.
Teltonika routers with KeySIM SIMs pre-installed, available via Solwise for faster rollouts.
One SIM type works across all locations — no operator-by-operator coverage assessment needed.
"Reliable connectivity is absolutely critical to our operation. Our screens need to receive content updates quickly and consistently for our customers, so any connectivity issue can directly impact service quality and customer experience."
"As our network of digital screens has expanded across the UK, resilience has become even more important. Since migrating our estate to KeySIM's multi-network SIM platform, we've seen a significant improvement in reliability across the board and have had no issues since deployment."
"Digital advertising screens are often installed in locations where mobile network performance can vary dramatically between operators. By using Teltonika routers together with our multi-network SIM cards, Crystal Clear Media gains the resilience needed for a fast-growing nationwide digital estate without relying on a single network provider."
"Through our partnership with Solwise, customers are also able to procure pre-configured Teltonika routers complete with KeySIM multi-network SIM cards already installed, helping simplify deployment and reduce installation time for large-scale projects. We're delighted to support Crystal Clear Media's continued expansion across the UK."
Digital advertising screens present specific connectivity requirements: they are fixed at locations across wide geographic areas, they must remain online continuously to deliver content to schedule, and they need to be managed remotely without on-site intervention. Any connectivity failure is immediately visible — and immediately affects campaign delivery.
As DOOH networks scale through organic growth and acquisition, the diversity of locations increases significantly. Screens in dense urban environments, along motorway corridors, and across regional towns all face different network conditions. Managing a growing estate with single-network SIMs means inheriting coverage risk at every new location.
KeySIM's multi-network IoT SIM cards are used across the digital signage and media sector alongside other clients including Clean Cut Sports, LTP Streaming, and Vizulink, all of whom depend on multi-network connectivity for consistent uptime across varied deployment locations.
Whether you operate a handful of screens or a rapidly expanding national estate, KeySIM's multi-network IoT SIM eliminates single-network dependency and keeps your content live.