Buying something you don’t really want, because you don’t have the self-discipline to wait 30 days or less for the product you do want, is a red flag. It shows a person who doesn’t have self-control and allows emotionally driven impulse to be the impetus for the purchase of the item that said person didn’t want to begin with.
Buying strawberries knowing you don’t like them or are allergic to them, because blueberries weren’t available, is illogical and down right foolish. And yet, that is what the OP suggested he was going to do and here you are using the same kind of thought process.
Buying a product you know you will return no matter what, is wrong, even though you have the money for the initial purchase. You did it with the watches and here you are about to do the same with the phones. I doubt you would appreciate customers doing that to you, if you were in charge of a business.