Is it hard to get approved for iPhone Upgrade Program

[Trauma1]

I've always bought my iPhones with the contract subsidies, swapping upgrades every year since I'm on a family plan. I'm wondering how difficult it is to get approved for iPhone upgrade program. I only have a credit card for under six months, debit cards for years. I don't have any debt, no loans, etc... but essentially no credit history. Will this situation likely be approved or denied? I can pay for the phone in cash but with a 0% interest I figure why not give it a shot. Plus there seems to be better availability with the upgrade program.