My FP4 has been switching off and restarting during use. I’ve tried disabling 5G as the advice on this sub says the problem is caused by switching between 4G and 5G bands, however this has not solved the problem. Rather the restarts seem to happen when physically moving the phone, most commonly when putting it down on a table, putting it in or taking it out of my pocket, and occasionally when just rotating it between portrait and landscape in my hands. This leads me to think there might be a problem with electrical contact between the phone’s modules - does anyone have insight as to which module I should replace?

  • Square-Singer@alien.topBEnglish
    1·
    1 year ago

    Could be the battery contacts.

    What I’d do if I where you is to disconnect and reconnect all cables in the phone to rule out the simple things first.

    If that doesn’t help, remove the battery and use a wooden toothpick to extremely carefully pull the contacts that connect to the battery maybe 1mm closer in the direction of the battery, so that there is slightly more pressure on the contacts when they touch the battery.

    Also make sure none of the battery contacts (both phone-side and battery-side) don’t have corrosion and the backside cover is clipped on properly.

  • Dryhte@alien.topBEnglish
    1·
    1 year ago

    A few thoughts…

    • does it also restart randomly without the SD card? (could be a bad SD card)
    • does it also restart randomly without the SIM? (could be a old/bad SIM)
  • n8mahr81@alien.topBEnglish
    1·
    1 year ago

    before considering replacing a module, check if all connections / connectors are solid and in place. i bet a lose connector causing a short could cause this issue.

  • hnspjotr@alien.topBEnglish
    1·
    1 year ago

    I have the same problem. Often find my phone at the login, because it has restarted while it was doing nothing. Can’t reproduce it. Tried without the SD card, same problem. Checked the battery, all good. Important to know; I was running Murena (/E/) without this issue for half a year. I switched back to Android (the FP4 version from the site) because Murena has an issue with a few apps that need the camera (like banking). So the problem started after installing Android 13. And since I can’t reproduce it, as it doesn’t seem to be connected to something I do, it leaves me with a phone I can’t trust. After a restart it will stay in login mode until I discover that and log in. So I can’t be reached. So I may have to choose between a dependable (and google-less) phone that has an issue with apps using the camera and a phone that works fine but does random restarts.