AG35 unable to connect US LTE provider

I have AG35 integrated into other devices. tried multiple provider (at&t, verizon, t-mobile), none of them are working. i only able to get EDGE or GSM service which is not LTE. I notice it only able to pick up LTE band 2 and band 4 with EDGE service for Verizon. GSM for AT&T and T-mobile. Is there any other setting or band setting i can try out?

When you try AT command:
What did you get? I got:
+COPS: (3,“Verizon”,“Verizon”,“311480”,7),(0-4),(0-2)

My chipset is AG35-cen. It only has workable LET band B5 in US. I still cannot get it to work in US.

i only have
+COPS: 0,0,"Verizon ",7
+QNWINFO: “FDD LTE”,“311480”,“LTE BAND 5”,2585
+QENG: “servingcell”,“NOCONN”,“LTE”,“FDD”,311,480,800C1C,328,2585,5,2,2,2005,-79,-8,-57,15,44

some configuration for AG35 is not correct which denied access.

Is there any Quectel tech support on this forum ?

So you only searched and got Verizon. Which carrier sim card you are using?

i was using verizon sim card.

I’m using China Unicom sim card. Could you run AT+QMBNCFG=“list” and AT+QMBNCFG=“Select”. Then let me know result.

+QMBNCFG: “List”,0,1,1,“hVoLTE-Verizon”,0x0501010E,000000000
+QMBNCFG: “List”,1,0,0,“Commercial-TMO”,0x0501050F,000000000
+QMBNCFG: “List”,2,0,0,“VoLTE-ATT”,0x05010334,000000000
+QMBNCFG: “List”,3,0,0,“ROW_Commercial”,0x05010800,000000000

+QMBNCFG: “Select”,hVoLTE-Verizon