MTS customers availing international roaming services for the first time need to walk into an MTS Branded Retail Outlet (BRO), submit the required documents including copy of a valid passport and request to activate the service on their mobile numbers and get their SIM card swapped to the International Roaming card. For additional customer convenience, interested MTS customers can also download the International Roaming service request form from the MTS India website (www.mtsindia.in) and submit it with the required documents at the nearest MTS BRO. Post the initial activation, on subsequent international visits, customers can simply dial MTS customer care to activate or deactivate international roaming on their MTS mobile numbers.