Suggest me a Good USB modem


Tata Photon Plus
Hello, ** First of all I want to say to admin that I am new to this forum. I am not sure about the appropriate section for this post. If I posted in wrong section, please move it to the appropriate one.I am planning to buy a new USB modem next week. I am thinking to purchase Airtel USB Modem with unlimited plan. I read that it offers 3G speed upto 10 GB, then the speed switch to 256Kpbs approximately. Are they really providing speed upto 256Kpbs, what is your experience ?I need a USB modem that must have unlimited plan with aprox. 256 KBPS after data usage such as Airtel. Please, let me know if there are any other alternatives. Thanks