That's a big if?? Cash? Use Credit if you don't! Just b/c the amount per month is small doesn't mean it is a great deal. Of course I agree that in can be beneficial in the first year, but after that not really. The resale value of phones are crap!
My rule is not to carry insurance unless it is something very expensive or a requirement. I've already paid more in auto insurance than in cars over the years. But clearly replacing the vehicles would have been far costlier. A cheap obsolete phone just don't cut it. And I guess you forgot that you have to pay a deductible on these phones, so it doesn't really work in your favor after a year anyway, especially if they are going to give you a refurb. LOL