is the clearest signal I have ever gotten on a phone

that if you change your setting to say LTE only, it will only work for a couple of seconds then the network turns your signal

I had a good signal

Phone APN, I got UMTS Band 5 connection (HSPA+ -- which they call 4g in this country but which is considered fraud everywhere else in the world because it is is just fast 3G, not 4g in any way).As soon as I changed it, I connected to FDD LTE Band