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It's a Cat B15Q, with Android 4.4.2, with most recent update as issued by Cat. I think it started with the most recent update. Unfortunately, Cat's support site doesn't work (you can't submit questions), so maybe someone here knows.

The phone always has a decent connection to WiFi, according to the icon. But after a while (it can be an hour or just 5 minutes), it no longer connects to the internet. I observed this on three different WiFi networks. Disabling and enabling WiFi fixes the connection, for a while. I disabled all sleep and battery saving options, but to no avail. It's driving me mad!

  • Even in the middle of a WhatsApp conversation, after sending a message, this happens. So annoying. – Sander de Jong Jul 28 '15 at 12:48
  • The utter unpredictability is what makes this so annyoing: the connection can last for a few hours, and suddenly, it will only last a few seconds, every time after reconnecting. I see the following options now: 1) throwing the thing out of the window; 2) waiting for Lollipop; 3) waiting for Cyanogen Mod; 4) FORMAT C: – Sander de Jong Aug 4 '15 at 13:46
  • The behavior is also network dependent: at home, I never have this problem. But at work and at other locations, I have. Maybe because at home I have only one WiFi station and at the other locations, the network uses different ones and the phone has trouble switching between these stations? Just a wild guess. – Sander de Jong Oct 6 '15 at 6:38
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A couple of days ago, Cat came out with a system update for my phone. One of the items was something about fixing WiFi issues. It seems to be working!

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why don't you try to get your phone back to the factory settings. i would suggest you to back your data prior going ahead with Factory Reset.

  • Well, this is indeed what Cat Support (after I had finally been able to make contact) recommended: "do a factory data reset followed by a software update" Hmm... let's see... this will take a lot of time and there is no guarantee for success. I'll wait a bit, maybe someone here has a better idea. – Sander de Jong Jul 29 '15 at 13:16
  • A couple of days ago, Cat came out with a system update for my phone. One of the items was something about fixing WiFi issues. So far, it seems to be working... If I don't see any problems within the next few days, I'll answer my own question. – Sander de Jong Feb 1 '16 at 11:00

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