Apps not installing help iPhone 3G

I found that I haven't been able to upgrade my apps or download new apps since yesterday. This has happened before and a reset settings worked, yet this time it doesn't... The only way I the apps to finish upgrading is to go on iTunes or use my wifi and disable using cellular data. I have an iPhone 4 for Sprint. I have tried a hard reset, downloading iExplorer and deleting the downloads file, signing in and out of my account on my phone, reset all settings, reset network settings, and even a system restore to my last back up, which was yesterday when I realized there was a problem. I also have to mention that whenever I try to install an app using cellular data it goes on waiting, then loading, then it loads about a little more than half way through, and it repeats. It never finishes, it goes into a cycle until I get a pop up stating "_______ is could not be downloaded at this time." with options of "done" or "retry" and when I press done, it should stop trying to install itself yet it goes into that same cycle again where it goes waiting, loading, blue bar 1/2 way through, and then repeat again... I do not use podcasts so that could not be the problem, I have none in my downloads list.