Why verizon sim return empty field for `s2g3glte`

i was using https://api.ic.peplink.com/rest/o/<orgid>/d/<dev-id>

tmobile and att return
"s2g3glte": "LTE",

but verizon returns "s2g3glte": "",

what is the reliable key ?

i can see "gobi_band_class_name": "LTE Band 12 (700 MHz)",

can you help which is the reliable key that works for all carriers

Typically, the s2g3glte field should not be empty. Please DM me the s/n and let us check it up for you.