Here are few AT commands that can show you what’s the LTE policy set by your mobile operator on the SIM:
CURRENTLY SELECTED BANDS: AT+QCAINFO
+QCAINFO: “PCC”,1650,100,“LTE BAND 3”,1,265,-73,-15,-37,-4
+QCAINFO: “SCC”,6350,100,“LTE BAND 20”,2,264,-59,-10,-28,9,0,-,-
+QCAINFO: “SCC”,528990,11,“NR5G BAND 41”,916
CURRENTLY SELECTED BANDS: AT+QNWINFO
+QNWINFO: “FDD LTE”,“42004”,“LTE BAND 3”,1650
+QNWINFO: “TDD NR5G”,“42004”,“NR5G BAND 41”,528990
TO READ ALL BANDS SET BY OPERATOR: AT+QNWPREFCFG=“policy_band”
+QNWPREFCFG: “gw_band”,1:2:4:5:6:8:19
+QNWPREFCFG: “lte_band”,1:2:3:4:5:7:8:12:13:14:17:18:19:20:25:26:28:29:30:32:34:38:39:40:41:42:43:46:48:66:71
+QNWPREFCFG: “nsa_nr5g_band”,1:2:3:5:7:8:12:13:14:18:20:25:26:28:29:30:38:40:41:48:66:70:71:75:76:77:78:79
+QNWPREFCFG: “nr5g_band”,1:2:3:5:7:8:12:13:14:18:20:25:26:28:29:30:38:40:41:48:66:70:71:75:76:77:78:79
TO SET ALL (OR SOME SELECTED) BANDS:
AT+QNWPREFCFG=“gw_band”,1:2:4:5:6:8:19
AT+QNWPREFCFG=“lte_band”,1:2:3:4:5:7:8:12:13:14:17:18:19:20:25:26:28:29:30:32:34:38:39:40:41:42:43:46:48:66:71
AT+QNWPREFCFG=“nsa_nr5g_band”,1:2:3:5:7:8:12:13:14:18:20:25:26:28:29:30:38:40:41:48:66:70:71:75:76:77:78:79
AT+QNWPREFCFG=“nr5g_band”,1:2:3:5:7:8:12:13:14:18:20:25:26:28:29:30:38:40:41:48:66:70:71:75:76:77:78:79
The above commands can be executed form:
the Internet → Modem Management → AT Command
UPDATE:
you can set your preference to LTE then 5G and vice versa: using such commands:
AT+QNWPREFCFG="rat_acq_order"
AT+QNWPREFCFG= "mode_pref"
Please refer to the the full manual to know how to set it: