Universal plug solves screen freezes?

[morgenstern]

I have a Fairphone 2, I generally use it in Italy and generally when I charge it I have screen freeze issues. With “generally” I mean with a number of USB cables, either connected to the power socket with an Italian plug or directly connected to the computer.
I am currently in Ireland and I charge my phone connecting a usb cable (one I also use in Italy) to the power socket with a universal plug.

The funny thing is that here the phone works perfectly: i have being here for almost one week and I never experienced any screen freeze.

Any idea of how this could happen? Does this universal plug do some kind of magic? xd What if I use it in Italy? Could this really solve the freeze issue?

This post probably fits either in the topic about screen freezes or in the one about the best charging cables for FP2, just feel free to move it anywhere you think it fits.

[Martin_Anderseck]

I think this is a pretty good explanation:

Fairphone 2 unusable while charging

Sounds like a grounding problem. The touch screen is looking for your finger to be at the same voltage as most of the phone (which is at the same voltage as you because you’re holding it). When you plug the phone in to a charger, the voltage of the phone changes to the “ground” voltage of what the charger is plugged into. Now the screen doesn’t see the phone at the same voltage as your finger and refuses to work. Some chargers are isolated (so the phone doesn’t get grounded) and some are not…

With the universal plug your actually unisolated charger gets isolated and it works as expected.