The mobile is the most useful invention of  the era. Now there are lots of mobile service providers are available all over the world but still people are facing problems and have many complaints. The country’s mobile subscribers had access to the internet, the Trai official said that the regulator was trying to expand the scope of  the platform to include SMS-based complaints. There is a need of  new and latest improvement “We are looking at different technologies to explore if  SMS or voice calls can also be made part of the online customer redressal platform,” the Trai official added. Trai is also of  the view that despite all operators having directed a three-tier redressal structure, which includes call centres, area-wise nodal officers and appallette authorities, most grievances went unaddressed. Cellular Operators Association of  India and the Association of  Unified Service Providers of  India are also in trouble. Over a demand by the industry that they be allowed to charge subscribers for calls made to customer care outlets.