The Cellular WAN details are extremely useful when troubleshooting.
Not only signal strength and quality are shown, but other about the SIM can be found here if an issue needs to be reported including:
ICCID | (Integrated Circuit Card Identifier) identifies each SIM internationally; it is the SIM cards unique identifier. |
IMSI | The unique International Mobile subscriber Identity. It is stored inside the SIM. |
MNC | Mobile network code |
MCC | Mobile country code |
IMEI | (International Mobile Equipment Identity) number of a mobile phone is a 15-digit number unique to a mobile handset. |