Practical guide. A personal alarm project needs a clear connectivity plan. This guide explains the questions to ask about SIM services, voice calls and mobile network changes before choosing equipment for a telecare deployment.
The UK network context
Ofcom’s advice for IoT and third-party device suppliers, updated on 1 September 2026, states that UK 3G networks have been switched off and that 2G withdrawal will take place over the coming years. Operator timetables differ. Its advice includes telecare devices and highlights the need to review services using international roaming SIMs. These are UK-specific developments: projects in other markets should check their own operators’ plans.
Ask what each service actually uses
Begin with a simple connection record for every proposed device configuration. Document the mobile operator or SIM reseller, the country of deployment, the hardware variant and the services that your workflow requires. Ask the supplier to explain how alert delivery, location reporting and voice calls are supported in that configuration.
A mobile data connection and a successful voice call are separate things to verify. Do not assume that a demonstration of one proves the other. Ask whether the proposed voice path depends on any network scheduled for withdrawal, and request a test plan appropriate to your chosen operator.
Questions for the SIM provider
- Which services does the plan include for this device and deployment?
- Which networks may the SIM access in the target country, and can those arrangements change?
- Are there roaming restrictions, usage conditions or account limits relevant to the service?
- Who provides technical support when connectivity fails?
- How will the provider notify you about network changes or a required SIM replacement?
Record the answers with their date and the relevant service documentation. Treat a proposed SIM plan as a project input that requires validation, rather than assuming every SIM offers the same service.
Separate three acceptance checks
Alert workflow
Activate manual SOS under the agreed test procedure and confirm that the expected recipient receives the alert. Record the result, configuration and test location. Confirm how your service handles an unanswered alert or a connectivity problem.
Two-way voice
Complete a conversation between the trial user and the intended responder. Check whether both parties can hear and be heard in representative indoor and outdoor settings. Verify the actual configuration intended for rollout.
Location information
Compare the location information presented to the responder with a known test position. Note the positioning conditions and any uncertainty. Read our GPS, Wi-Fi, BLE and LBS guide for background on the different methods.
What to discuss with Amulink
WPD-01 is Amulink’s 4G personal emergency alarm, with manual SOS, two-way voice contact, fall-alert functionality and multiple positioning methods. For a proposed deployment, discuss the target country, operator, SIM plan and response workflow with Amulink. Confirm the required configuration before ordering samples or planning a larger rollout.
This guide does not confirm WPD-01 support for a particular operator, voice implementation, roaming plan or monitoring platform. Those details require project-specific technical review. The technology page provides product context, while our 4G personal alarm selection guide covers broader purchasing questions.
Plan the next review
Keep the test results and supplier answers together. Name the person who owns connectivity changes after deployment, and agree when the operator and SIM arrangements will be reviewed again. A documented review process helps teams identify changes that call for retesting.
For a sample or B2B project discussion, contact marketing@amulinkcare.com or share your OEM personal alarm requirements.
Source checked on 10 October 2026. Ofcom’s cited supplier guidance was last updated on 1 September 2026. The project checklist is original Amulink editorial guidance.