You can make all the excuses you want to debunk GPS but in no way can you justify satellite phones without satellites. Sailers commonly use these far out in the middle of the Pacific and Atlantic oceans where eLORAN would not even reach, and even if it did it wouldn't matter since eLORAN is one way, and the eLORAN towers don't have receivers. Please note that one of the biggest satellites that manage most of the calls is called the Iridium. Iridium is NOT owned by NASA and is owned by a private company called SpaceX. You cannot just say satellite phones don't work because they do. Read the reviews on Amazon, most of them are good. If they did not work there would be great outrage and SpaceX would likely get sued.
SpaceX does not own Iridium. SpaceX only launches the satellites. Iridium is its own company and manages the network.
Does not matter who launched it, the fact is it works, and you cant make a "oh it works cus radar" excuse. I suggest you do some research in radar and GPS before blurting out "radar is GPS". Do this: go online, find the schematic and topography of a GPS IC and the same with a radar receiver. Look at the similarities and differences. You will see that they are not cross compatible. If you are ready to make the claim "radar is gps" they you better be ready to show a crap ton of evidence and an in-depth comparison of GPS and RADAR ICs.