"Unlimited bandwidth" means there is no restriction or limit on the amount of data you can use or transfer over the internet. You can freely download, upload, and stream without worrying about any limitations on data usage. Full definition
The free account is limited to a single user, while the premium account enabled unlimited bandwidth for up to five computers or mobile devices. (howtogeek.com)
Some people have unlimited bandwidth during certain hours only — perhaps during the middle of the night. (howtogeek.com)
The marriage of a genre - specific operation such as Press Box Publicity with an agency like Smith Publicity with unlimited bandwidth created a «perfect storm» of outstanding client service for publishers and authors. (pressboxpublicity-smithpublicity.com)