No, the phone is mine, it is a collateral for the loan. If I'm not paying, the court must acknowledge the fact before the lender has the right to private enforcement.
They are "changing the perspective" to a behavior which is predatory and stacked against one party. A company cannot just write anything they want into a contract and expect it to be enforceable; there are rules surrounding what is and isn't acceptable in contracts.
Yes, I must pay the sum because I've borrowed the money and what happens to the phone is my responsibility. It has nothing to do with the rights of the lender. Their rights are to repossess the phone if it is not paid because the phone is collateral, not because they own it.