I'm currently paying $150 for two lines, which comes with 3000 minutes and 5GB of 4G speeds. Since I don't even use half of that, I'm thinking of switching to the $120 plan that comes with 1000 minutes and 2GB of 4G speeds. Now when switching plans on T-Mobile, they require a new two year contract. How does this affect my current contract? Does it add two years on my remaining contract, or just resets back to two years? Also how about my upgrades? I'm eligible for upgrades in Feb 2013. So basically, do I switch plans now and save $30 a month. Or do I wait for Feb and upgrade my phones, then switch plans?