i think the data plans on pay as u go only work with "certified roger's handsets"
not sure if your samsung blackjack 1607 is certified, or not but it doesn't look like a model i recognize. I have a rogers black jack and its called the i616 blackjack. which supports the pay and talk data plans.
You could be correct with that,I thought that because it was purchased in Canada from a large company as a unlocked phone that I could ajust settings to operate somewhat to its potential well mabea not.