updating app problems..

[mcbridejames]

I recently came across a samsung infuse and made it into a straight talk phone, but for some reason I am unable to update my apps, when I use my snapchat it wont let me use my front camera, I tried different APN's. Some of my apps have gotten to where they wont open because they need to be updated, a message will pop up about updating the app and when I choose update it goes to my app store but doesn't give me the option update it. I'm lost. Does anyone know what to do? anything will help at this point.