I've got a dual-sim Galaxy S7 Edge (SM-G935FD) this spring and everything was fine until a week ago my second SIM started to disappear randomly. Basically I wake up the phone after a while and I see no indications of the second SIM: no signal bars and "No SIM card in slot 2" message in settings. Rebooting the phone sometimes solves it for a while -- the second SIM becomes visible and works as expected but after a few hours it disappears again.

Things that I have tried so far:

  • wiping out cache partition
  • forcibly setting second sim to "2G only"
  • manually choosing mobile operators for both sim cards
  • swapping sim cards -- problematic sim card would still disappear after a while, now from slot 1.
  • putting the problematic sim card into another phone -- it works just fine, not disappearing at all
  • factory reset

The issue still persists. Currently my first sim (the one which works well) is set to "auto (4g/3g/2g)", also mobile data goes through that card. My second sim (the problematic one) is set to "2g only", although setting to "auto (3g/2g)" gives same result.

Inspecting phone logs with adb logcat while the second sim is invisible hasn't revealed anything suspicious..

My software:

Android 7.0




1 Answer 1


It appeared to be a bizarre SIM issue: after replacing the SIM I haven't seen such behavior for more than a month. It's weird that the SIM would fail sporadically and a reboot would fix it, also that it would happily work on other devices. Anyway, this is hopefully solved now.

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .