+CPIN: READY
M0.12.00,A.02.19
. Validate if you have the latest firmware running by going to the u-blox website and scrolling down to the section Product Change Note. Find the document which relates to your specific modem model.+COPS: 0,0,"<name of operator>",X
. The last digit indicates the cellular technology:0
: indicates GSM
3
: indicates GSM/GPRS with EDGE availability
7
: indicates LTE-M
9
: indicates NB-IoT+COPS: 0
wait for a minute and try again.+COPS: 0,0,"<name of operator>",X
. The last digit indicates the cellular technology.XXXXX
with the MCCMNC code of your operator, for example"20404"
for Vodafone NL. Use 7
for LTE Cat-M1.+CSQ
returns 2 values separated by a comma. The first value represents the signal strength and provides a value between 0 and 31; higher numbers indicate better signal strength. The second value represents the signal quality indicated by a value between 0 and 7. If AT+CSQ
returns 99,99
, the signal is undetectable or unknown.2, 3, 4, 5, 8, 12, 13, 20, 26, 28
1, 2, 3, 4, 5, 8, 12, 13, 18, 19, 20, 25, 26, 28
1
(counted from right to left): 10000100
+UBANDMASK: 0,524420,1,524420
0
represents LTE Cat-M1 followed by the bandmask indicating the bands. 1
represents NB-IoT. Convert the decimal number to binary number to find out which bands the modem is locked to. 524420
as a binary number is: 10000000000010000100
, indicating that the band is locked to band 3, 8 and 20 (count the bits from right to left).data.mono
:+CGDCONT: 1,"IP","data.mono","0.0.0.0",0,0,0,0,0,0
+CGACT: 1,1
ATI
and look and the line Revision
L0.0.00.00.05.06
, L0.0.00.00.05.08
and L0.0.00.00.05.11
M0.09.00
, M0.10.00
and M0.11.01
2
indicates 2G, 6
indicates LTE Cat-M1, 7
indicates NB-IoT. When you see 5
, run the command AT+UCGED=2
again and retry.
The fifth variable indicates the band, in the example you see the modem using band 20
. +CGPADDR: 1,XX.XXX.XX.XXX
Success authenticate_pdp_context
AT+CCID