SM-G920w8 AT RIL error


pls help cant write cert on phone

Waiting ADB device… OK
Reading phone info…
Model: SM-G920W8
Android version: 5.1.1
Product code:
Phone version: G920W8VLU3BOK1
PDA version: G920W8VLU3BOK1
CSC version: G920W8OYA3BOK1
CSC country code: Canada
CSC sales code: GLW
HW version:
Phone S/N: RF8GB32KA9H
Modem board: SHANNON333
RF cal date:
IMEI:
Checking Super user right… true
Initialization AT RIL… error

Done with Samsung Tool PRO v.24.3