Mohammad Khalid, a resident of Ballimaran in Delhi, was arrested after a woman filed a complaint stating she had received obscene messages from two different numbers.
During interrogation Khalid revealed his modus operandi to the police.
"He would randomly dial any number and if the caller turned out to be a female then he used to send obscene clips and texts to them. Khalid has been sending such texts to women for the last one year," Delhi Police Dy Commissioner of Police, Vijay Singh told media.
Mr Singh further told that, "Khalid also used to threaten to upload their mobile numbers and pictures on facebook and twitter."
According to police, Mohammad Khalid obtained the SIM cards using a fake identity.
Delhi prosecutors have levied charges of sexual harassment, stalking and criminal intimidation under the Indian Penal Code.