Update: I just got an email from Consumer Cellular. They've once again increased our service at no additional cost. The 600 minutes of phone calls is now 750 minutes, the 5,000 texts went to unlimited, and the 1.0 GB of data went to 1.5 GB. All this for two phones at $50/mo, less AARP 10% discount, plus taxes and fees comes out to $57 and change every month. We didn't use all the data when it was 400 MB, nor all the minutes when it was 250 min, and we've never texted, but more is available now than ever -- maybe we should downgrade to the next cheapest plan for $10/mo less for data (down to 500 MB), and still have a little more than the 400 MB we started with, plus knock $5/mo off the talk plan and have the same 250 minutes we started with -- that'd make $35/mo instead of $50.
This is, they say, the 10th time in the last eight years that they've upgraded service at no extra cost. It's certain this is the 3rd (or is it 4th) time since we've been with them, still at the original, no contract monthly fee. They use AT&T's network, so coverage is pretty decent.