Solved OPO connection problem: Might be the carrier
Although I enjoy my OnePlus One, I noticed its telephone connection is terrible. That didn't make sense to me (it's newer than the Nexus 4, which I used previously but only had 3G available) and yet the connection quality was the same, and considerably worse than that of the Fajita. It didn't really make sense.
Then I read this unfortunate article from January.
So it is quite possible that the OPO is locked out of the 4G network due to T-Mobile's constant desire to have people upgrade their phones. While it's tempting to shop for a OP5 now that the installer is in beta, I am going to try switching carriers before buying another phone.
That does sound like a carrier problem, and a local one at that. Over here in the Netherlands, no such problem exists with T-Mobile.
I'm so dumb.
All this time (I've had this phone for weeks) I've been concerned about the signal strength, the voice quality... I can't believe what the problem was. While roaming this forum, I got bored and decided to check the settings.
It was set to 2G the whole time.
I just got off a crystal clear call.
I am so embarrased.
@totalrando I suspect you are not the only one to have ever done something very similar with an issue Look on the bright side you solved the issue. Job well done.