Field Test Mode

Every iPhone has a hidden "Field Test Mode" that can be accessed by dialing a special "*3001#12345#*" phone number from the main dial-pad

From within this mode, you can dig up details about your cellular connection that are not normally available, such as your raw signal strength, currently active LTE band, and whether or not carrier aggregation is active.

Testing & Understanding Your Mobile Internet Speeds
Understanding & Optimizing Your Cellular Data Performance
Testing Internet Speeds & Performance for Mobile Connectivity
Testing internet speeds allows you to measure your real-world performance to know if your signal enhancing efforts are having an impact on your mobile internet setup.
Optimizing & Understanding Cellular Data Performance - Getting Better Speeds & Reliability
There are a lot of variables that can impact the actual cellular performance you receive, and understanding them can help you better understand tweaks you can make to your mobile internet setup to optimize for the best data speeds and consistency.
Antenna Ground Planes for RVs and Boats
Many antennas have a ground plane built in, but in particular magnetic mounted antennas (often kitted with mobile boosters) require one be provided. These antennas are specifically designed for automobile use, and being placed on the roof of a metal car or truck. The magnet keeps them connected to the metal roof, however, what a lot of folks don't realize is that the metal roof is also serving as the ground plane - an integral part of the antenna's performance. Most RVs and boats don't have a metal roof. So what can you do?

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