If the device exceeds a certain temperature threshold, it will present a temperature warning screen similar to this: An iPhone showing this message might still be able to make emergency calls. To resume use of your device as quickly as possible, turn it off, move it to a cooler environment, and allow it to cool down.
A lien on property is a type of security interest placed on a piece of property, real or personal, in order to secure a debt or obligation. While the underlying legal theories are different, in a practical sense, a lien is similar to a mortgage, in that the property that is the subject of the lien is taken and sold by the creditor to satisfy the debt of the property owner.
A lien gives rights to the lender that, unless the property is paid, the lender has a right to sell that property. In other words, both documents are used to make sure the borrower pays back the loan. Both documents allow the person or entity to sell the property if the borrower cannot meet the terms of the loan.