Penalties for others using a phone, even if it is to send a single text, at the wheel have also doubled starting along with a fine of 200 pounds.
New drivers who get six points or more on their licence for breach of rules will have to retake their practical and theory exams to re-qualify to drive and more experienced drivers can be banned if they get 12 points in three years.
"Doubling penalties will act as a strong deterrent to motorists tempted to pick up their phone while driving and will also mean repeat offenders could find themselves banned from our roads if they are caught twice.
"Everyone has a part to play in encouraging their family and friends not to use their phones while driving - it is as inexcusable as drink driving," he said.
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A consultation last year on proposed tougher penalties for using a mobile while driving received almost unanimous support, the UK's Department for Transport said.
Chief constable Suzette Davenport, the head of roads policing on the National Police Chiefs' Council, said: "These new penalties reflect the seriousness of the offence and will strengthen the deterrent against using a mobile phone at the wheel.
Police forces across Britain also began a seven-day crackdown today, with extra patrols and an "increased focus" on stopping people using their phones while driving.