Some apps won't work with my data?

I have an iPhone 4s and when IIm out of Wi-Fi range and turn on my data some of the apps I did not have on at first to save data usage, do not connect when I turn them on. For example, when I try to use my Bank of America app, the app is on with my data but it still says "network unavailable, search for Wi-Fi or try again later." This does it with some other apps. This happened to me with my iPhone 5s but I do not remember what I did to fix it. Someone know what's wrong?

Then check your phone and clean all of your apps and data usage. You should take care od data.

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