Hello @xyzashu, very interesting this topic, I never would have thought hehehe thank you for bringing it up.
It is rare to change a fixed telephone because it is damaged, since they are more resistant, and it should be noted that due to being fixed, they have less risk of falling and being damaged by the blow.
you do not have to change the battery, because they do not use it.
These are other great advantages compared to the use of mobile phones.