The LG G3 VS985 lacks support for LTE Band 12 (700 MHz) and Band 5 (850 MHz) , which are primary coverage bands for US Cellular in rural areas. This results in poor LTE connectivity even if the SIM is recognized.
Put the battery back in, snap the cover on, and power the phone up. Network & Connectivity lg g3 sim card us cellular
Furthermore, carrier activation policies present a bureaucratic hurdle. US Cellular, like many carriers, maintains a whitelist of devices allowed on their network. As the LG G3 ages, it may fall off this supported devices list. Customer service representatives may be unable to provision a SIM card for the device because the IMEI (International Mobile Equipment Identity) is no longer recognized in the system as a compatible device. This is a common scenario for phones that predate the recent advancements in VoLTE and 5G, rendering a perfectly functional piece of hardware obsolete due to administrative and network protocol changes. The LG G3 VS985 lacks support for LTE
There are two stacked silver slots next to the volume buttons. The bottom slot is for your Micro-SIM card. (The top slot is for a MicroSD card). Customer service representatives may be unable to provision