In some countries it has become difficult to live without a WhatsApp account. I'm doing it, but it's a pain since WhatsApp is used for everything that phone calls were once used for: schedule appointments, keep in contact with your kids' teachers, buy and sell goods, etc. The same numbers often won't pick up the call, or it will be simply turned off (since it's used just for WhatsApp).

Imagine living without a phone, or whatever is equally important in your area. Sure, it is possible, if you're at the right level of masochism.