Ditching the landline and just using cell phones?

My husband and I ditched our landline and only have cell phones, and it works out well most of the time. However, recently we had a bit of a problem with our cell phone reception, and since we're both with the same company, we were completely phoneless for a while. Which was not good. So now I kind of wish we had kept a landline, just for emergencies, or had cell phones on different systems or something.