<P> The pan-European 112 code was introduced in the UK in April 1995 with little publicity . It connects to existing 999 circuits . The GSM standard mandates that the user of a GSM phone can dial 112 without unlocking the keypad, a feature that can save time in emergencies but that also causes some accidental calls . All mobile telephones will make emergency calls with the keypad locked . Originally a valid SIM card was not required to make a 999 / 112 emergency call in the UK . However, as a result of high numbers of untraceable hoax calls being made, this feature is now blocked by all UK networks . Most UK mobile telephone handsets will dial 999 / 112 without a SIM inserted (or with a locked / invalid SIM), but the call will not be connected . Following the blocking of SIM-less calls, in 2009 the UK networks introduced emergency call roaming . This allows a user with a valid SIM of a UK network to make emergency calls on any network for which they have coverage . </P> <P> Silent solution 55 is the name given to the initiative that allows people to call 999 when they aren't able to speak . If there is no answer, the operator will then ask you to cough, or make another audible sign that you're in need of police assistance . If you're in too much danger to make any sound at all, the call will be put through to an automated system which asks the caller to press 55 if they're in danger . </P> <P> 999 or 112 is used to contact the emergency services upon witnessing or being involved in an emergency . In the United Kingdom, the numbers 999 and 112 both connect to the same service, and there is no priority or charge for either of them . Callers dialling 911, the USA's emergency number, will be transferred to the 999 call system if the call is made within the United Kingdom . </P> <P> An emergency can be: </P>

If you dial 911 in uk what happens