My cell phone is the smallest, cheapest, least powerful feature phone Samsung makes, used with a prepaid plan. All it does is calls and SMS, and that's all I want it to do. The rest is something else's job. (And a reason for that is that the rest tends to want a bigger display than a practical smartphone can have.)
The landline is VOIP. My ISP offered a triple play of TV, Internet and VOIP, but I held off on the latter because it was a net save if you made LD calls, but for practical purposes, I didn't. I finally switched when Verizon's basic local loop charge crept above the cost of VOIP. I immediately found myself in a project that required living on the phone long distance for a month, so the switch did pay off.
I had been a telecom admin, dealing with what turned into Verizon, and was delighted to be shut of them.
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Dennis