Originally Posted by
Sallyann1234
The US do not allow the use of any other GNSS. They did not and do not like other nations having positioning systems that the US cannot switch off or control. That's their problem to deal with, although I understand that the EU has requested clearance for Galileo in the US. That of course gets tied up with trade issues.
Are you sure about that? - I am currently sitting in Missouri and my cellphone has no problem using GLONASS with GPS switched off - its currently using 4 of their satellites..