So I just currently paid off my tab so right now I'm at a $0 balance. My last phone I went with a Tab Medium because I had $300 to use toward a new phone. Now when I go under my tab it shows I'm only with a Tab Small? My question is now that my tab is paid off I'm looking to upgrade my phone. Can I now go with a Tab Medium and again get $300 toward a new phone? Also am I able to keep my same plan with the Tab Medium? Thanks in advance!