The Delhi High Court today extended till February 1 its interim stay on award of contract by state-run BSNL for its Rs 20,000 crore project to add 45 million lines in its GSM network.A Bench headed by Justice Swantater Kumar and Justice H R Malhotra fixed February 1 as the date for hearing Motorola's petition challenging BSNL's decision to disqualify it from the bidding process of the GSM contract.