We are using the nrf9160 with SLM V2.4.2 and Modem V1.3.6 and we can do 6 calls to the Verizon cell network in 3 minutes and 30 seconds apart with no issues.
However, on the 7th call (26 minutes after the first call) we get this message unsolicited message coming out of the nrf9160 after which time the nrf9160 must be factory reset for it to work again. What is causing this problem?
#XCARRIEREVT: 10,0
%XSIM: 1
%CESQ: 73,3,13,1
+CEREG: 2,"3D01","00EFBA02",7
Sent: AT%XDATAPRFL=0
OK
%MDMEV: RESET LOOP