if this happens, likely to be your sim card, if note it will remotely be the sim card slot module faulty.
i'm using samsung for several years and i only encountered once for my previous nfc sim card. after i see that message, my phone auto restart then my sim card can no longer detect liao. changed a new sim card and the service resumed..
Bro, I have the same problem as you. After upgrading my S7E to Nougat since its release, my phone crashed on 21 Mar & the motherboard was replaced by the service centre.
25 Mar, my SIM card died as well. Tried the faulty SIM card on another slot on S7E & a different phone to no avail. Another SIM card that I have proved that the problem was with the faulty SIM card & not a phone issue.
Imagine 2 strikes in ONE week! (Didn't experience any issues with S7E or the SIM card prior to the Nougat upgrade!)
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