Link mobile number, vehicle details to avail vital services at RTOs: STA Post News Network Also read: According to official sources, vehicle owners in the state can now avail various services including transfer of ownership, change of address as well as renewal of registration certificate in online mode at any RTO, irrespective of their vehicle registration with an RTO in Odisha. Vehicle owners are required to link their mobile phone number along with vehicle details on the official VAHAN portal to avail the services. Taking to its Twitter page, the STA wrote, “If mobile number of the vehicle is not registered or incorrect in the VAHAN database, vehicle owners have to update their mobile phone numbers in the official website of Transport department