I have been using alliance broadband for around last 2 and half years and I want to say that they are the most consistent internet provider in Kolkata.they have a lot of customers and the numbers are going higher everyday because of their consistency.they provide the best packages I would suggest everyone to take the unlimited one because it gives a speed of 2 Mbps constantly and its cost is also pocket friendly.their customer service is also very good, I reach them anytime I call.so, I would suggest everyone to check this provider out.