presidential alert system Mobile phone users across the country have just received a "presidential alert." Here's what you should know.

Mobile phone users across the country have just received a "presidential alert." Here's what you should know.

As of 2:18 pm ET on Wednesday, Americans across the country were boycotted by urgent notification on their mobile phones.

related search : presidential alert system - what is a presidential alert - presidential alert october 3 - Emergency alert -National Wireless Emergency Alert System

"Presidential message", read the message. "This is a test of the national wireless emergency alarm system.

The message was detonated by cell towers across the country in 30 minutes, and the message is expected to reach about 225 million people in an unprecedented federal exercise.

Wednesday's test of the Wireless Emergency Alert System is the first time emergency management officials have used nationwide alert capabilities for the President's Office.

The feedback on the alarm was quick. #PresidentAlert has become a common theme on Twitter, with some saying that the message has stopped. Others reported receiving notifications on their smartphones, while others took the opportunity to crack jokes. Some said they had been notified repeatedly, some of them up to three to nine times.

Came through, flew like mad and also paid to Apple Watch. It was kind of annoying. I survived.

- Trent Moore (trentlmoore) October 3, 2018

A number of iPhone users on the AT & T network - including this reporter - have not received notification until their smartphones are restarted.

FCC This is exactly what happened to me. On the ATT in Nova near Dallas. Reboot and EAS came through.

- Richard Shawky (@ rshockey101) October 3, 2018

FEMA, AT & T and Apple did not immediately respond to the request to comment on the matter.

Many cell phone users may be aware of the alerts they receive as warnings about fast floods or missing children. However, these weather alerts and AMBER alerts can be sent only at the regional or state level, not at the national level or at the same time.

 Confused about those emergency mobile phone alerts? Here's how they work. ]

The Presidential Alert was designed to allow the White House to inform the entire country almost immediately of serious public emergencies, such as a terrorist attack or invasion, according to the Federal Emergency Management Agency. While Americans can choose not to receive weather alerts or AMBER, they can not withdraw from the presidency.

Not everyone was pleased with the decision to send the test alert. Just minutes before the warning was sent, a federal judge in New York rejected a lawsuit by three people who claimed that the presidential warning violated the first and fourth amendments, because the Americans were unable to withdraw. The judge explained that the allegations were highly speculative, according to the Associated Press, and were motivated by concerns that President Trump had sought to turn the emergency radio alarm system into a "second Twitter summary."

Despite its name, President Trump did not issue the presidential alarm directly. But in general, the operation calls on the president - or his representative - to authorize the Federal Emergency Administration to send a warning to the White House.

📳 Today (10/3): At 2:18 pm EDT, we will test the nationwide wireless emergency alert system. Expect a message box on your phone with a high tone and vibration.

questions? Visit https://t.co/Op8T9AEpiF pic.twitter.com/cCXJGGObPP

- FEMA (ema) on 3 October 2018

Prior to the presidential alert on mobile phones, it should be routed to wireless carriers, such as AT & T and Verizon, through an online system called the General Alert and Integrated Warning System, or IPWS.

The mobile phone alert is also accompanied by a similar test for the emergency alert system, an old system that deals with radio and television.

The federal government is required by law to test its own alarm systems every three years. The Federal Emergency Administration was last tested in 2016 and 2017, and the first emergency wireless alerts were sent in 2012.

However, all mobile phones may not receive an alert on Wednesday. If you are not in a cell tower or if your phone is switched off, you may have missed the message. This was expected to be the case for about a quarter of the country's mobile phones.