I'd say test phones are not needed anymore and even less so going forward. Was useful in the old days I haven't carried one in years. Downside is I need to workout what's going in its cutout place in the case
Agreed the euro mini has positives but few optimas or accentas fail. I'd put an xm6 up against pretty much anything else for longevity
Mr h isn't a panel snob, he made me accept the Premier was a decent panel
I don't think you can, you need to fix the supervision issue as the detector probably won't work if it activated. That's the whole point of supervision alarms