@Kevin_Z I saw a new firmware update saying "Fixes SMS issue", but after updating SMS still doesn't work.

@Sukhchain 

Hi, the Jio SIM is another issue as we can confirm now, the support engineers are working actively with the local team as well as the Jio support, we will update here once the issue is confirmed and fixed.

@Kevin_Z 

I confirm that my router is a MR600 V2 latest firmware: 1.3.0 0.9.1 v0001.0 Build 210208 Rel.61056n

I did several tesst with my 4G provider:

1. I tested a second sim card from same provider that my wife was using with a USB 4G Key --> error was different: 54 instead of 56
2. I explained to my provider the situation, and he explained to me that my 4G sim card was actived for a mobile and not for a 4G modem ... surprise do not know that it was possible that a sim works only in a mobile and not a modem
3. They reactivated my sim card --> instead of errocode 56, errorcode was 54 as with my wife sim card
4. I did some different tests with different numbers for SMS servers and target mobile numbers when I discover suddenly that I was able to send SMS because I changed the SMS server number format with international prefix : for France "+33" instead of using local prefix "0"

My conclusion on my experimentation with this provider: use 4G sim card for 4G modem and use international format (+XX) for sms server and target mobile numbers

Hope it will help someone

Regards

Stephane

@Kevin_Z  Is there any solution for this , or still its been worked upon , i am also facing the similar issue with JIO