explain meaning of this addon

[mrfixu]

my internet plan is internet 6 and have an addon which says " unlimited data"  does that mean for my phone or what?  can someone explain?

[xray]

There are data limits for home Internet service as well. My plan had a limit.

[polecat]

@mrfixu  On fiber with 25/25 a 300 data cap I can purchase unlimited date for $20 month. We don't go over the 300 and if we did they charge $5 extra for that month. On internet 6 probably not worth buying. Check  your bill and see what you are paying for. Polecat