I’ve tried Honest Mobile, which won’t be a surprise if you’ve followed my attempts elsewhere on this forum to get a decent signal at home…
You’re right. The crucial thing, which they’re quite honest about (no pun intended), is that Smart Signal only kicks in when there’s absolutely no signal from Three. Such occasions are vanishingly rare, even in my bunker of a property, where it’s more likely that I’m technically connected but not sufficiently to maintain a workable conversation.
Of course, if you do genuinely find yourself in a total blackspot, it’s likely that you’re somewhere not covered by the 99-ish % population coverage of most networks, and so O2 and EE won’t be there either.
In short: great idea, but limited utility for most. In any case I believe they’ve stopped the Smart Signal offering now while they work on an updated version, whatever that will be. They still have WiFi calling but it’s via a 3rd party app and not perfect in execution.
On the original topic: I found them to be a decent network if not stellar in any way. It’s a different niche to Zevvle and one that you pay a premium for. Customer service is good. Billing is not easy to understand. The app is clunky but works and has good notifications. Can’t comment much on the B-Corp thing, but not necessarily a red flag in my book, otherwise I might need to rethink my bank as well