[INFO] Cellular interface UP [INFO] Current config: 4g LTE 5m H43 C50 Mv2.227 [INFO] Attached to eNodeB 0x1A3F (Cell 50) [INFO] Bandwidth: 5 MHz, Channel: 2116.7 MHz [INFO] Firmware Mv2.227 OK

: Optimized for travel, business trips, and outdoor activities. Expandable Storage : Includes a micro SD card slot (supporting up to 32GB or more

Given the lack of vendor specification, C50 most likely refers to or a threshold of 50 (RSRQ, CQI, or timer).