Wiretapping

You choose a telephone or similar communications device you can see within range and mystically tap into its workings. Until the spell ends, when the device is used to communicate with another creature, you can hear the communications in your mind. You can hear the voices of communicating creatures and recognize them if you have met them before. This spell doesn't translate languages or decode secret messages.

At Higher Levels. If you cast this spell using a spell slot of 3rd level or higher, the duration is concentration, up to 10 minutes. If you use a spell slot of 4th level or higher, the duration is 8 hours. If you use a spell slot of 5th level or higher, the duration is 24 hours. If you use a 7th level spell slot, the spell lasts until it is dispelled. Using a spell slot of 4th level or higher grants a duration that doesn't require concentration.