Fair Usage Policy (FUP) is specific data limit on various internet plans, which is imposed by Internet Service Provider (ISP) companies. FUP is applicable on all unlimited data transfer internet / broadband plans. In all unlimited broadband plans, the data transfer continues to be unlimited, although internet speed is reduced after crossing the FUP data Limit. FUP limits are implemented to ensure that the best quality of broadband service is available to the maximum number of internet subscribers. FUP prevents to spend unwanted extra money, after crossing the limit of allowed data. For Example, If you have unlimited broadband connection plan of 80 GB, then after this FUP limit of 80 GB, your speed will be down to a specific speed nut you will not be charged extra after 80 GB data of FUP.