Check Your Upgrade
If you're planning to buy the iPhone 8, make sure you check your account to ensure that you're in good standing and eligible for an upgrade.
Checking your upgrade is extremely easy. You can login into your account at AT&T, Sprint, Verizon or whatever carrier you're currently using and check your status there.
You can also call your carrier's customer service line and check your status that way as well. Sometimes it's comforting to hear it from a real person.
You can also quickly check using your phone and you can also check via Apple's website though you'll need to have some very specific information to do so. If you're the primary account holder, it shouldn't be a problem.
This should only take a few minutes of your time and it's an extremely important step to take before you buy a new iPhone.