Majamulli, May 24, 2019 : Hey everyone, I'm still using my OnePlus One from 2014 and am generally happy with it. Sadly I've got a weird connectivity problem. At my home I sometimes have mobile internet H+ and it works fine, but only for a few seconds (10-15) and then the connection ends. It will still show H or H+ but I've got no internet access. It usually takes between 3-5 minutes to reconnect and it will once again only be connected for a few seconds. When not connected I also can't use the phone, neither can I call someone nor can I be called. If however I start a phonecall while being connected to the internet and normal mobile network I can keep phoning for as long as I want, there's no issue with the connectivity at all. This problem is not only at my home but also in many places of my city. At some places I have "stable" mobile internet, in other places I don't have any connection at all. I tried using the sim card in another phone and it worked totally fine, no connection issues whatsoever, even in places where I didn't have any connection with my OnePlus One. I also tried several different sim cards and mobile internet providers, no change, same problem. I thought I might be able to fix it by upgrading to another newer OS version cause I haven't had an update for quite some time. So I went ahead and installed the newest LineageOS this morning. Works fine, but the connectivity problem is still the same without any change. Soooooo.... anyone got any idea?