CellOne all India Help ‘1800 180 1503’ or ‘1503’ BSNL Landline For queries on BSNL landline contact the call center at 1500 or 1800 345 1500. BSNL Mobile For queries on BSNL mobile contact the call center at 1503 or 1800 180 1503. BSNL WLL For queries on BSNL WLL contact the ca...