Seniors who opt for the Jitterbug Smart4 — Lively’s “simplest smartphone ever ... Sometimes it’s a percentage off the phone’s price, a credit to your account, or a free gift, such as a car charger.

It might seem silly to some people, but many others realize that there is a very large, under-served market for phones designed with seniors in mind. Now, six months later, the Jitterbug is ...