Qayyum Qureshi (45), a butcher by profession, was arrested this morning.
Qureshi allegedly chopped off his 18-year-old son's right hand from the wrist with a knife last night, said inspector P Laxmikanth Reddy of Pahadishareef police station.
"The victim, who works for a cable operator, had recently bought a smart phone and continuously watched films on it despite his father warning him against it," the police officer said.
The father and son had a heated argument over the issue two days ago. During the tiff, the son allegedly bit Qureshi.
The victim's mother lodged a complaint with police today. Police arrested Qureshi under section 307 of IPC (attempt to murder), said the police officer.
Qureshi's son was undergoing treatment at a hospital and his condition was stable, he added.