I'm up for an upgrade soon. I was wondering if you have to use their plan bundles, or if you can make your own. Such as Unlimited Texting, Unlimited Data, and then like 400 minutes. They have a plan like that with 500 minutes, but that's too much for me. And also, how much GB would I need? I have wi-fi at home, and I also have an iPod Touch, so I usually surf music and Youtube on there. I would probably just use the internet, some apps (such as Instagram), on the go. So would I need 2gb or 5gb? Or does T-mobile have an option of 3gb?