# LTE Modem Registration Issue

Source: https://forum.modalai.com/topic/348/lte-modem-registration-issue
Category: ESCs, Sensors and Accessories (https://forum.modalai.com/category/15/escs-sensors-and-accessories)
Tags: cellular
Posted: 2021-07-22 20:21:14 UTC by Chuck Bokath
Replies: 1 · Views: 1098

## Chuck Bokath · 2021-07-22 20:21:14 UTC

Hi, I have a modem that would only connect with UMTS initially, I figured the SIM wasnt provisioned to receive LTE services from ATT. I called ATT and they provisioned the SIM with the IMEI of the modem. I dont know if there is PDP context or some other AT command I need to get a data connection up and going.  Any ideas? Thanks in advance!

The status and LTEinfo commands are pasted below.

connect: Network is unreachable
AT!GSTATUS?
!GSTATUS:
Current Time:  71               Temperature: 47
Modem Mitigate Level: 0         ModemProc Mitigate Level: 0
Reset Counter: 8                Mode:        ONLINE
System mode:   LTE              PS state:    Not attached
IMS reg state: NOT REGISTERED   IMS mode:    Normal
IMS Srv State: NO SMS,NO VoIP
LTE band:      B12              LTE bw:      10 MHz
LTE Rx chan:   5110             LTE Tx chan: 23110
LTE CA state:  INACTIVE
EMM state:     Deregistered     Attach Needed
RRC state:     RRC Idle

PCC RxM RSSI:  -93              RSRP (dBm):  -137
PCC RxD RSSI:  -69              RSRP (dBm):  -99
Tx Power:      0                TAC:         2C09 (11273)
RSRQ (dB):     -13              Cell ID:     0B33780F (187922447)
SINR (dB):      2.8

OK
AT!LTEINFO?
!LTEINFO:
Serving:   EARFCN MCC MNC   TAC      CID Bd D U SNR PCI  RSRQ   RSRP   RSSI RXLV
             5110 310 410 11273 0B33780F 12 3 3   4  87 -12.1  -99.5  -70.7  26

IntraFreq:                                          PCI  RSRQ   RSRP   RSSI RXLV
                                                     87 -12.1  -99.5  -70.7  26
                                                    340 -14.2 -102.5  -79.7  26

InterFreq: EARFCN ThresholdLow ThresholdHi Priority PCI  RSRQ   RSRP   RSSI RXLV

GSM:       ThreshL ThreshH Prio NCC ARFCN 1900 valid BSIC RSSI RXLV

WCDMA:     UARFCN ThreshL ThreshH Prio PSC   RSCP  ECN0 RXLV

CDMA 1x:   Chan BC Offset Phase Str

CDMA HRPD: Chan BC Offset Phase Str

OK

## Reply by tom (ModalAI staff) · 2021-07-23 17:00:51 UTC

@Chuck-Bokath Are you using an LTE v1 or v2 modem? Are you using `voxl-modem` in order to connect to the network?