1. iMore Question's Avatar
    My iPhone 6 update to 9.3.1 and my SIM card not work and sim not valid message popup on screen.
    04-09-2016 02:21 PM
  2. Branta's Avatar
    Eject the SIM and reinsert fully home. If that doesn't work try power off and reboot. If still no good try the. SIM in a different phone or a known good SIM in your phone. Finally contact your network and try a new SIM.
    Laura Knotek likes this.
    04-09-2016 04:18 PM

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