© GettyThe end is nigh for the traditional landline
This will mean millions of customers will have their phones connected online to make a call.
The move has been compared to the switch to digital TV in 2012, when broadcasters stopped transmitting traditional analogue signals to household aerials.
That change was led by the Government.
But this switch to "digital" calls is now being driven by the telecoms industry.
The upgrade will also involve services relying on the existing telephone network such as alarm systems, phones in lifts, payment terminals and iconic red telephone boxes.
Telecoms giants are aiming for the switchover to be complete in 2025, reports the Daily Mail.
And it will work easily on the most basic broadband connection.
But experts have raised concerns that millions of older and vulnerable households are not online.
It is feared it will also impact those who cannot get mobile phone or internet reception in remote and rural areas.
Watchdog Ofcom believes about 6% of households or around 1.5 million homes do not have access to the web.
Many use the internet on their mobile phone via wireless services, while about half a million households do not own a mobile, let alone a smartphone.
Director of Age UK Caroline Abrahams said: "Given that about half of older people over the age of 75 are not online, this could be a particular problem for our oldest citizens.
"Given the threat of fraud, telecom providers also need to take steps to prevent anyone who is in particularly vulnerable circumstances from becoming victims of digital scams."
Ofcom has stressed that telecom providers must provide free mobiles and battery packs if there is a power outage.
Already, two million customers are believed to have already been switched to internet-based phone service.
An Openreach spokesman said protecting vulnerable customers is an absolute priority for us.
Ofcom said it was working to make sure vulnerable customers will be supported.
The new system connects your phone differently and phone customers might have to be plugged into a hub or router directly, or an engineer might have to reconnect the wall socket.
Customers won't have to pay for broadband and will be able to pay only for the phone connection.
But a package with phone, broadband and TV can often work out as a better deal than paying for them all separately.
There are 1.1m people who pay only a landline and three out of four of them are with BT.
Around 2.3million former BT landline customers could be given up to £500 each in compensation following a court case against the telecoms giant.
Reader Comments
They're doing this to basically force people into the mobile trap. Everyone will be required to have their very own portable Orwell device, like the telescreens from '84. This isn't anything to do with upgrading or whatever. This is social credit system one step closer all under the guise of "helping" the customer.
Bar stewards. The lot of 'em.