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.
Lien is a record that can be put on your asset, meaning that any sale proceeds of the asset will go to a lien holder/lien holder must approve any transfer of ownership. The asset continues to belong to you though.