PDP Authentication Failure

Hi! I’m having trouble connecting my uBlox c027 with LISA U200 cellular modem. It fails the join step with a PDP Authentication Failure. I’ll include the debug output below with the AT output for the failing step:

Device: LISA-U200
Power Save: Disabled
SIM: Ready
CCID: 8944500410165938991
IMEI: 352648069540078
IMSI: 234507095593899
Manufacturer: u-blox
Model: LISA-U200
Version: 22.90
CSD Registration: Roaming
PSD Registration: Roaming
Access Technology: 3G
Signal Strength: -107 dBm
Bit Error Rate: 25
Operator: T-Mobile
Location Area Code: 09BB
Cell ID: 038F5CB6
12.593 AT send 12 "AT+CGATT=1\r\n"
12.653 AT read OK 6 "\r\nOK\r\n"
12.702 AT send 14 "AT+UPSND=0,8\r\n"
12.762 AT read + 17 "\r\n+UPSND: 0,8,0\r\n"
12.821 AT read OK 6 "\r\nOK\r\n"
12.878 AT send 23 "AT+UPSD=0,7,“”\r\n"
12.938 AT read OK 6 "\r\nOK\r\n"
12.978 AT send 24 "AT+UPSD=0,1,“hologram”\r\n"
13.054 AT read OK 6 "\r\nOK\r\n"
13.104 AT send 15 "AT+UPSD=0,6,0\r\n"
13.164 AT read OK 6 "\r\nOK\r\n"
13.213 AT send 14 "AT+UPSDA=0,3\r\n"
15.764 AT read ERR 42 "\r\n+CME ERROR: PDP authentication failure\r\n"
15.846 AT send 15 "AT+UPSD=0,6,1\r\n"
15.906 AT read OK 6 "\r\nOK\r\n"
15.956 AT send 14 "AT+UPSDA=0,3\r\n"
18.606 AT read ERR 42 "\r\n+CME ERROR: PDP authentication failure\r\n"
18.689 AT send 15 "AT+UPSD=0,6,2\r\n"
18.749 AT read OK 6 "\r\nOK\r\n"
18.798 AT send 14 "AT+UPSDA=0,3\r\n"
22.429 AT read ERR 42 "\r\n+CME ERROR: PDP authentication failure\r\n"
Your modem APN/password/username may be wrong


Thanks for reaching out! Can you try again now? We took a look at your SIM and saw that it wasn’t activated yet with the carrier. It’s now been activated fully with the carrier and should allow you to connect. Let us know if you have any further issues and we can take a look.



Did the trick! Thanks so much for your quick support!