@jeder Having E range or even no signal is typical for even traveling with Koleje Dolnośląskie. At least when I was traveling with Intercity for example to go from Wrocław to Kraków or Wrocław to Poznań at least I had either LTE, or 3G. (My SIM doesn't support 5G ​:hakaselaugh:​
@jeder Usually when I was traveling Legnica - Wrocław, Wrocław - Legnica worst signal was around Środa Śląska and Miękinia so not fun... Also I usually just slept in train which is dangerous a bit... Hehehe stupid silly me sleeping on train.