A THUG ended up in the dock at court after leaving his friend scarred for life in a row over a mobile phone.

Erskine man Robert Dunn turned on David Beaton in the Trongate area of Glasgow on August 23 this year.

Glasgow Sheriff Court heard how 23-year-old Dunn had dropped Mr Beaton's phone, leaving the screen smashed.

He then pounced on his victim, slashing him on the face, during a trip to a shop to have the phone repaired.

Mr Beaton was taken to Glasgow Royal Infirmary, where he needed 10 stitches to repair his facial wound.

Dunn admitted assaulting Mr Beaton to his severe injury and permanent disfigurement when he appeared in court today.

The court heard that Dunn tried to board a bus in the city centre at around 4.20pm on the day in question.

Mr Beaton, whose face was bleeding, asked the driver not to let Dunn on board, as he had "slashed him."

A 999 call was made and police traced the pair together.

Mr Beaton told officers he had been assaulted by Dunn, who was then arrested.

Prosecutor Sarah Latta said: "He had a three-inch wound to the right side of his face which required 10 stitches which will leave a permanent scar.

"He told officers that he and Dunn were friends who fell out due to an incident where he dropped his phone.

"Mr Beaton said he would repair the smashed screen and then went to a shop nearby, where they had an argument and Dunn slashed his face."

Officers later found traces of blood and the neck of a bottle where the assault took place.

Sheriff Matthew Jackson QC deferred sentence until next month so background reports could be prepared.

Dunn was remanded in custody while he waits to learn his fate.