My old Bluetooth headset, a Plantronics Legend Pro, was giving me some trouble. Callers reported that my sound broke up or that they could not hear me. A reset of the headset by switching from the headset to the iPhone (my old 6S) and back might temporarily fix the problem, but it continued to give me an issue. The phone and headset were at least a couple of years old, the headset probably the older of the two units.
I decided to abandon both my phone and my Bluetooth headset. After talking about a larger iPhone for months (I really wish I had the 6S+), I decided to upgrade my iPhone and try a wired headset. So I bought a new iPhone 8+ and I love the bigger screen. I can now read incoming email without squinting. The new headset is working well and has very nice sound (for music as well as voice calls). But the camera of the new iPhone is much improved over my old unit.
While walking my favorite in-town route, I paused to let The Girl sniff about while I made a macro-photograph of one of the roses. I used an Olloclip macro lens on my iPhone and the result is very pleasing.
I think the upgrade was worth the cost. I know that I can hear much better and I think my callers can hear me better as well.