The Huawei 4G router isn't recognizing the SIM card.
The Huawei 4G router isn't recognizing the SIM card.
You're experiencing issues with your Huawei 612-51D when inserting a SIM card. It's possible the card isn't properly seated or there might be a problem with the charging port. Check that the SIM is fully inserted and try using a different one to rule out a faulty card. Also, ensure the device is powered on and the SIM tray is clean.
It's identifying all your information and transmitting it back to the central location.
Besides a basic switch cleaner, you might consider swapping it out. A firmware upgrade could also be an option before purchasing a new one.
Checked compatibility with your provider's bands and network type. The Amazon listing notes it doesn't function on a CDMA network. It also provides the bands that operate in the US.