EM9191 does not connect to 5G on Verizon

[fcl]

In my testing, EM9191 does not connect to 5G NSA on Verizon network. If I put the Verizon sim card in an iPhone, the iPhone connects to 5G band 5 along with LTE.

Is there any command or requirement for EM9191 to connect 5G bands on Verizon network?

By the way, with a T-Mobile sim card, EM9191 can connect to 5G on the T-Mobile network.

AT!IMPREF?
 current fw version:      03.09.11.00                                           
 current carrier name:    VERIZON                                               
 current config name:     VERIZON_030.046_001

AT!BAND?                                                                        
Index, Name                                                                     
00, All bands

AT+COPS?                                                                        
+COPS: 0,0,"Verizon ",13

AT!SELRAT=0F

at!gstatus?
!GSTATUS: 
Current Time:  2137             Temperature: 35
Thermal Mitigation Level: 0
Reset Counter: 2                Mode:        ONLINE         
System mode:   LTE              PS state:    Attached     
LTE band:      B13              LTE bw:      10 MHz  
LTE Rx chan:   5230             LTE Tx chan: 23230
LTE SCC1 state:INACTIVE         LTE SCC1 band: B2     
LTE SCC1 bw  : 20 MHz           LTE SCC1 Rx chan: 1100
LTE SCC1 UL Configured: FALSE   LTE SCC1 Tx chan: 0
LTE SCC2 state:INACTIVE         LTE SCC2 band: B48    
LTE SCC2 bw  : 20 MHz           LTE SCC2 Rx chan: 55943
LTE SCC2 UL Configured: FALSE   LTE SCC2 Tx chan: 0
LTE SCC3 state:INACTIVE         LTE SCC3 band: B48    
LTE SCC3 bw  : 20 MHz           LTE SCC3 Rx chan: 56141                         
LTE SCC3 UL Configured: FALSE   LTE SCC3 Tx chan: 0                             
LTE SCC4 state:INACTIVE         LTE SCC4 band: B66                              
LTE SCC4 bw  : 20 MHz           LTE SCC4 Rx chan: 0                             
LTE SCC4 UL Configured: FALSE   LTE SCC4 Tx chan: 0                             
EMM state:     Registered       Normal Service                                  
RRC state:     RRC Connected                                                    
IMS reg state: REGISTERED       IMS mode:    Normal                             
IMS Srv State: FULL SMS,UNKNOWN VoIP                                            

PCC RxM RSSI:  -63              PCC RxM RSRP:  -95                              
PCC RxD RSSI:  -73              PCC RxD RSRP:  -110                             
SCC1 RxM RSSI: -84              SCC1 RxM RSRP: -115                             
SCC1 RxD RSSI: -86              SCC1 RxD RSRP: -116                             
SCC1 RxM1 RSSI:  ---            SCC1 RxM1 RSRP:  ---                            
SCC1 RxD1 RSSI:  ---            SCC1 RxD1 RSRP:  ---                            
SCC2 RxM RSSI: -96              SCC2 RxM RSRP: -124                             
SCC2 RxD RSSI: -91              SCC2 RxD RSRP: -119                             
SCC2 RxM1 RSSI:  ---            SCC2 RxM1 RSRP:  ---                            
SCC2 RxD1 RSSI:  ---            SCC2 RxD1 RSRP:  ---                            
SCC3 RxM RSSI: -95              SCC3 RxM RSRP: -123                             
SCC3 RxD RSSI: -90              SCC3 RxD RSRP: -121                             
SCC3 RxM1 RSSI:  ---            SCC3 RxM1 RSRP:  ---                            
SCC3 RxD1 RSSI:  ---            SCC3 RxD1 RSRP:  ---                            
SCC4 RxM RSSI: -87              SCC4 RxM RSRP: -115                             
SCC4 RxD RSSI: -89              SCC4 RxD RSRP: -117                             
SCC4 RxM1 RSSI:  ---            SCC4 RxM1 RSRP:  ---                            
SCC4 RxD1 RSSI:  ---            SCC4 RxD1 RSRP:  ---                            
PCC Tx Power:  ---              TAC:         xx (xx)                       
SCC1 Tx Power: ---                                                              
SCC2 Tx Power: ---                                                              
SCC3 Tx Power: ---                                                              
SCC4 Tx Power: ---                                                              
RSRQ (dB):     -13.6            Cell ID:     xx (xx)                
SINR (dB):      6.6                                                             
                                                                                
NR5G band:       ---            NR5G bw:         ---                            
NR5G Tx Power:   ---            NR5G Tx chan:    ---                            
NR5G Rx chan:    ---            NR5G RSRP (dBm): ---                            
NR5G RSRQ (dB):  ---            NR5G SINR (dB):  ---

[jyijyi]

you need to establish data channel by MBIM and generate traffic in order to go to 5G(ENDC).

[fcl]

Hi, actually I generated heavy upload and light download traffic for about 30 minutes, but the module remained in LTE mode during the traffic. What kind of traffic will the module switch to ENDC? Are there other things to check? Thanks.

[jyijyi]

I remember I used IPERF to generate traffic.
Also please make sure the testing area is having 5G.

ATi3
Manufacturer: Sierra Wireless, Incorporated
Model: EM9191
Revision: SWIX55C_03.09.03.00 b23ca1 jenkins 2022/02/18 00:29:11
IMEI: 355890340412345
IMEI SV: 21
FSN: 8W127402123123
+GCAP: +CGSM


OK
AT!entercnd="A710"
OK
+DMI: Authentication Failed;  Server ID: 1000
+DMI: Authentication Failed;  Server ID: 1000
+DMI: Authentication Failed;  Server ID: 1000
+DMI: Authentication Start;  Server ID: 1000
AT!impref?
!IMPREF: 
 preferred fw version:    03.09.03.00
 preferred carrier name:  VERIZON
 preferred config name:   VERIZON_030.033_001
 preferred subpri index:  000
 current fw version:      03.09.03.00
 current carrier name:    VERIZON
 current config name:     VERIZON_030.033_001
 current subpri index:    000

OK
AT!LTEINFO?
!LTEINFO: 
Serving:   EARFCN MCC MNC   TAC      CID Bd D U SNR PCI  RSRQ   RSRP   RSSI RXLV
             5230 311 480 33802 02063503 13 3 3  15 200 -12.8  -67.2  -37.8 --

IntraFreq:                                          PCI  RSRQ   RSRP   RSSI RXLV

InterFreq: EARFCN ThresholdLow ThresholdHi Priority PCI  RSRQ   RSRP   RSSI RXLV

CA SCell : EARFCN   SCID   Bd  ST  D  U   Mdl  Mul  PCI  RSRP   RSSI   SINR

WCDMA:     UARFCN ThreshL ThreshH Prio PSC   RSCP  ECN0 RXLV


OK
AT!NRINFO?
!NRINFO: 
Connectivity Mode: NSA

NR5G Cell ID:    199
NR5G band:       n2        		NR5G Carrier ID: 0
NR5G dl bw:      15 MHz    		NR5G ul bw:      15 MHz    
NR5G Tx Power:   -13         		NR5G Tx chan:    371540
NR5G Rx chan:    387540
NR5G dl MIMO:    4         		NR5G ul MIMO:    1
NR5G(sub6) RxM RSSI (dBm):   -39.8	NR5G(sub6) RxD RSSI (dBm):   -49.0
NR5G(sub6) RxM1 RSSI (dBm):  -43.5	NR5G(sub6) RxD1 RSSI (dBm):  -41.0

NR5G RSRP (dBm): -72			NR5G RSRQ (dB):  -11
NR5G SINR (dB):  22.5


OK
AT!GSTATUS?
!GSTATUS: 
Current Time:  1300		Temperature: 34
Thermal Mitigation Level: 0
Reset Counter: 1		Mode:        ONLINE         
System mode:   ENDC        	PS state:    Attached     
LTE band:      B13    		LTE bw:      10 MHz  
LTE Rx chan:   5230		LTE Tx chan: 23230
EMM state:     Registered     	Normal Service 
RRC state:     RRC Connected  
IMS reg state: REGISTERED      	IMS mode:    Normal       
IMS Srv State: FULL SMS,UNKNOWN VoIP   

PCC RxM RSSI:  -35		PCC RxM RSRP:  -65
PCC RxD RSSI:  --- 		PCC RxD RSRP:  --- 
PCC Tx Power:  -15		TAC:         840a (33802)
RSRQ (dB):     -12.8		Cell ID:     02063503 (33961219)
SINR (dB):     17.2

SCC1 NR5G band:       n2     	SCC1 NR5G bw:         15 MHz    
SCC1 NR5G Tx Power:   9	SCC1 NR5G Tx chan:    371540
SCC1 NR5G Rx chan:    387540
NR5G RSRP (dBm): -71		NR5G RSRQ (dB):  -11
NR5G SINR (dB):  23.0


OK

[fcl]

Thanks. If I put the Verizon sim card in an iPhone in the same physical area, the iPhone connects to 5G band 5 along with LTE. Does EM9191 prefer LTE carrier aggregation B13+B2+B48+B48+B66 to ENDC?

I will also try iperf.

[jyijyi]

What is the 5G band combination for the ENDC in iphone?

[fcl]

I think iphone uses B13+n5. The screenshot below is from ios 15 last month (masked cell and TAC). ios 16 shows 5G NSA, B13+B48+B66.

[jyijyi]

EM9191 supports DC_5A-66A_n5A where 66A and n5 are uplink bands
But I don’t see B13+n5 for the RF combination…

you can check AT!RFCOMBOS?

Where to find the EM9 Carrier Aggregations and EN-DC (Doc# 41114262)?

@mohamedh Sorry for the really long delay in reply, essentially its complicated and will vary depending on the baseline the firmware you have is based on so it is probably going to be easier to just ask the unit what it supports with the below commands. at!entercnd=“A710” at!rfcombos? You will see that the current 3.9.6.0 firmware supports 3.5k combos so does not lend itself well to documentation. Regards Matt