Advanced Mobile Location
Definition
Advanced Mobile Location
Advanced Mobile Location (AML) is a telecoms standard that pushes a smartphone’s precise GPS, Wi-Fi, and cell-network location to emergency services the moment a caller dials a national emergency number. The handset sends the data automatically by SMS or HTTPS, free of charge, and only during the call itself.
Key takeaways
- AML transmits a caller’s location within about 5 metres outdoors and 25 metres indoors, far tighter than legacy cell-tower triangulation.
- The handover happens in the background within 20 seconds of dialling, with no app install required on the caller’s side.
- AML is built into Android (since 2016) and iOS (since 2018), and now covers more than 30 countries across Europe, Asia, and the Americas.
- Emergency call centres still need back-end integration to receive the SMS or HTTPS payload, which is why deployment differs country by country.
- BPO-staffed emergency dispatch and roadside-assistance lines often handle the verbal half of the call while AML feeds the digital half.
AML matters because the location data a 999, 112, or 911 dispatcher used to receive was loose — usually the centre of a cell-tower coverage zone that could span several kilometres. AML closes that gap in seconds, which buys ambulances, fire crews, and search teams real minutes.
How it works
When you dial an emergency number, the operating system on an AML-enabled handset wakes the GNSS chip, queries nearby Wi-Fi access points, and reads the serving cell, then bundles the result with a confidence radius. That packet is delivered to the public-safety answering point by SMS, HTTPS, or both, and the radio stack switches off once the call ends.
The full sequence usually completes within 20 seconds. According to the European Emergency Number Association, AML can locate a caller roughly 4,000 times more accurately than cell-ID alone.
| Stage | Trigger | Typical time | Data sent |
|---|---|---|---|
| 1. Detect | User dials national emergency number | Instant | None yet |
| 2. Fix | OS activates GPS + Wi-Fi + cell scan | 5–20 seconds | Internal only |
| 3. Transmit | Handset sends SMS or HTTPS payload | Under 5 seconds | Lat/long + radius + handset ID |
| 4. Deactivate | Call ends | Instant | Logging stops |
The system is silent for the user — no prompt, no permission dialog, no battery drain outside the call window. Google calls its implementation Emergency Location Service (ELS); Apple ships it as part of iOS emergency calling. Both follow the same ETSI TS 103 625 AML technical specification.
Examples
The United Kingdom switched AML on across all four mobile networks in 2016, and BT’s 999 service now receives an AML location on roughly 85% of mobile emergency calls (BT, 2023). Lithuania, the first country to deploy it nationally in 2016, credits AML with cutting average location-determination time from minutes to seconds.
In Australia, Telstra activated AML in 2020 for Triple Zero calls, and the Australian Communications and Media Authority confirmed nationwide carrier coverage by 2022. Estonia integrated AML directly into its 112 dispatch software in 2018, allowing call-takers to see the GPS pin on the same screen as the caller’s number.
The Philippines, India, and Mexico are mid-rollout in 2024, with outsourced contact centre operators handling overflow on national emergency hotlines while local telcos finish back-end integration. According to Ofcom, AML coverage across the European Union sat above 26 of 27 member states by year-end 2023.
Related terms
- Geolocation is the parent concept — pinpointing a device using satellite, Wi-Fi, or cellular signals — and AML is one of its emergency-specific applications.
- Voice over IP (VoIP) calls can also carry AML data, though support depends on the carrier and the dialler app.
- Contact center operations sometimes manage non-emergency overflow lines that need similar caller-location tooling.
- Business process outsourcing providers staff many of the human-side dispatch and triage roles that sit alongside AML feeds.
- Telecommunications carriers are the parties that must enable AML transport on their networks before any handset can use it.
- Customer service teams in roadside-assistance and insurance verticals borrow the same location patterns for non-emergency calls.
FAQ
Does Advanced Mobile Location use my mobile data plan?
No. AML transmits via SMS or HTTPS on a carrier-funded channel, so the caller is never billed for the location packet, even when roaming.
Can I turn AML off?
Yes, but you have to dig for it. On Android the setting sits under Emergency Location Service in the Location menu, and on iOS it is bundled into the emergency-call settings. It is on by default in every region where AML is deployed.
Which countries support AML today?
Roughly 30 countries had live AML deployments as of 2024, including the UK, Ireland, Lithuania, Estonia, Belgium, Austria, Australia, New Zealand, the United States (partial), and most Western European states. EENA keeps the official tracker.
Is AML the same thing as Enhanced 911 (E911) in the US?
Not quite. E911 is the US regulatory framework that requires carriers to deliver caller location to PSAPs; AML is one of the technical methods used to meet that requirement, alongside other carrier-side techniques.
What happens if the caller has no GPS signal?
The handset falls back to Wi-Fi positioning and cell-tower trilateration. Accuracy drops to 25–100 metres indoors, but dispatchers still receive a usable fix.
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