Hi,
Just want to let you know that Sodaq found the issue why sending data was not working. It turned out that an arduino sketch I was using did change the band somewhere underneath to 20 (which is used by Vodafone) After I changed the band (AT+UBANDMASK) to 8 manually, the T-Mobile sim started sending data.
Regards,
Raymond
Hi,
I already saw the thread and upgraded the firmware to the latest version. Still without luck. But, I am in contact with Sodaq for this AT commands issue. Once this issue is solved I will send the output of the commands you requested.
Regards,
Raymond
Hi, just tried to issue the commands you suggested. Unfortunately I don’t get any AT output at my arduino serial monitor. Looks like after the first AT command the board get’s in a strange state. Need to solve this first in order to send you the results 
Hi,
I registered my device as UDP. These are the commands I used. I switched off and on the antenna (AT+CFUN=0 and AT+CFUN=1) multiple times. That could make a difference I found somewhere on a forum, but with no luck.
AT+URAT=8
AT+URAT?
AT+CMEE=2
AT+CGDCONT=1,“IP”,“cdp.iot.t-mobile.nl”
AT+CGDCONT?
AT+CFUN=1
AT+COPS=1,2,“20416”
AT+CSQ
AT+CEREG=2
AT+CEREG?
AT+CGPADDR
AT+USOCR=17
AT+USOST=0,“172.27.131.100”,15683,4,“Data”
AT+USOCL=0
Hi, I use the nb-iot T-Mobile sim (from dev-kit) in combination with the sara r410m board. After I installed the passthrough sketch and follow the steps at the Sodaq site I never get a connection. Always get a AT+CSQ always showing 99,99. Do I need to activiate the sim or something like that? Note that I get a connection using a Vodafine sim.
Regards,
Raymond