Not necessarily. I just use my old deactivated phone while I’m home. Saves the battery on my actual phone. (On that note, I need to get a replacement for my current one soon. The charge port is starting to give out…)
Needless to say, my ringtone has been Shut Up and Explode by The Boom Boom Satellites since about 2012, and my notification/ text / email alert is Mayrui Shiina from Steins Gate saying Tuturu since about the same time.