We have a problem with the SARAN211 that we was wondering if anyone else have experienced.
We have a unit that was installed 2019-08-23 and worked fine until 2021-06-02 when it suddenly stopped sending data. We checked the sim activity in our portal and could se that nothing was happening. We got the unit back from our customer last week after not being able to send any data for over four months!
We started debugging the unit and could see that it still was alive, but when it tries to send the AT+CFUN=1 command it received Error from the modem. We noticed that every AT command regarding the sim gives error, such as AT+CPIN, AT+CCID ect. If we change the error replies to numeric we get:
CME Error 50 on AT+CPIN?
CME Error 4 on AT+CFUN=1
We have had this problem before with a unit, and removing the sim and putting it back did not change anything. But when we removed the “broken” sim and put another sim in to the unit it started to work. After that we tried to put back the “broken” sim and then the sim started to work again.
Does anyone know what can cause this? Have anyone had the same problem?
We do not want to remove the sim on this unit because we need to find out why this is happening and if there is a way to resolve this problem if it happens again thru software change.
Modem version is 06.57,A09.06