I've got the same issue, but it finally went out for good. I've only had this phone (XZ1 compact) for a year. My Z1 compact only lasted 2 years. My Droid X lasted 6 years. For the past 5-6 months it would have occasional connection issues to wifi. Rebooting or cycling Airplane mode would fix it. It's been happining more frequently as time goes on. I know it's not from a recent update because Windows has taught me not to update unless I want to wipe my device when their update breaks it. I only update my laptop and phone once a year when they start getting cluttered and slow (clean install) and I expect them to last at least 4 years. About a month ago this phone suddenly wouldn't turn on WIFI. It tried, then it just turned WIFI back off. After rebooting, it said no SIM card inserted. No WIFI or Bluetooth either. Reboot again and it works. Over the next few days, it worked less and less. I even did my yearly wipe and update. I've troubleshooted the SIM mechanical connection and changed Sim cards. It finally crapped out. I haven't gotten any network stuff working in 2 weeks. I just swapped the 3 antenna pieces out and checked for loose connections. Nothing. I'm on a $20 prepaid phone. I think I won't be spending $500 on a phone again. Especially since you can't find a phone under 5" in the U.S. anymore. Planned obsolescence is becoming a real problem. I'm about to cook the logic board in the oven. The way we used to cook the XBOX 360. I can't figure out which chip is for the WIFI/Bluetooth, so the whole thing goes in the heat.
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