supplementary telephone
The Spanish phrase 'teléfono supletorio' translates to 'supplementary telephone' in English. This phrase commonly refers to an additional telephone that is connected in the same line to fill out or complete a telephone set. For instance, it can be another handset in the household or office that rings when the main telephone line receives a call. It embodies the idea of an extra or backup telephone for use where the primary telephone may be inaccessible or inconvenient.
I have lost my backup phone and I don’t know how to contact anyone.
This phrase expresses concern about losing a backup phone, highlighting the importance of having a reliable way to communicate.
The backup phone is very useful when the main one runs out of battery.
This sentence emphasizes the practicality of having a secondary phone available to ensure continuous communication.
I always carry a backup phone when I travel just in case.
This statement reflects the idea of being prepared for any situation during travel by having an additional phone.