Locating android phone I lost my phone. I have a Samsung Galaxy S5 with the corresponding newest Android version that's automatically delivered. I never really used the Google Service so it isn't authorized or whatever.

I do have a WhatsApp Web and Telegram Web Version.

Is there any way, also a techy way, of checking where my phone is? It doesn't have to be very precise.

Can I for an instance use the Telegram Web Session to make an HTTP Request from my phone to some homepage and check the IP using the access log and from that the imprecise location? Does anyone have other ideas?
I don't think you can. Without any tracking app (meaning an app that finds the device, for an instance Google's Find My Device app. 

Depending on when and where you lost it, it may not be possible to find it. If it's somehow been turned off (i.e. water damage, it fell from somewhere high, ran out of power, etc) you can't find it. 

If you had an app for tracking you would have a chance at using that to find it. Otherwise you're stuck using manual searching.

You could also use other apps as a workaround. If you're using Google Fit and had an internet connection when you lost it, you could probably use that to find where the GPS trail ends. But that assumes it registered activity, it wouldn't be possible to use it if you lost it for an instance at the office or somewhere else that's stationary.

And as far as I know, you can't use Telegram or WhatsApp to ping your phone.