You may do well to obtain an external antenna, either omni-directional or directional antenna (if you know for certain where your nearest cell antenna is, and can point it there with a clear line of sight). This antenna would need to be mounted outside your home or office.

That tiny connector there should be called an “SMA” connector, and the specific antenna you need will depend on which cellular technology you are on, 4G, LTE, and so on.

California requires front and rear plates.

The best ones are the ones you use. After that, focus on the NRR, and if you need to be able to clearly hear what people are saying to you, there are Earasers; they are a passive ear plug with a bypass membrane which lets speech through.

I use them on airplanes (I fly a lot), and I’ve used them at concerts and they really do greatly reduce excessive noise while still being able to have regular conversations.

This is the same tool @Ghost.org is (was?) using to bring federation to publishers using the Ghost platform.

hunter3 for everything.