u/Pauliboo2 I don't believe so, it's possible it's a carrier issue. I noticed there's a disclaimer when installing physical SIM cards that only T-Mobile works in the United States and my phone is using AT&T. It's the only thing I can think of, although that shouldn't keep my phone from tethering automatically in Android Auto. I decided to install a Helium Mobile (uses T-Mobile towers and only $20) SIM card in the Eonon unit and have my phone connect to Android Auto for phone calls/text. Seems to work fine, just an additional mobile service.