You said in an earlier post "like I said maybe a couple times a year I use data on roaming when I go to Upper Michigan where there is no Sprint service" so they have noted that usage and now after your recent roaming usage they are letting you know that since you have done this a few times now you are pushing your limit on roaming data. That's all. I know they say unlimited roaming data but that means you are allowed to use roaming data any time you want and you won't be restricted to a certain amount at any certain time but if you use over 300MB of roaming data regularly then they will contact you like this. Every carrier does this and most restrict you to regular home data limits depending on how much you pay for your data plan. The simple solution is watch your roaming data usage and you will be fine.
