I don't think that is correct. Taken from the JOD contract:
"Purchase Option at End of Lease Term. As stated above, you have an option to purchase any remaining item(s) at the end of the scheduled lease term for the purchase option price for that item set forth above. This price does not include any taxes that may apply if you exercise your option to purchase. You do not have an option to purchase any item of Equipment before the end of the scheduled lease term."
"Early Termination. Following the Return Period, you may end this JUMP! ON DEMAND Lease Agreement before the end of the scheduled lease term by notifying us in writing of your intention to do so at least 30 days before you terminate and returning all remaining items of Equipment. If you terminate the lease early under this paragraph, you must pay us the sum of the following (the “early termination amount”): (i) any past due payments or other unpaid amounts due under this lease, plus (ii) the remaining unpaid scheduled lease payments for the remaining items, plus (iii) any excess wear and use charges, plus (iv) any additional fees or taxes related to your payment of these amounts."
The way I read this, you don't have the option to buy out the phone early, and if you do attempt to early terminate, you owe them the phone back PLUS all remaining payments. In order words, you have to ride out the lease until the end.
Please correct me if I'm wrong.