Boards are fundraising to help the people of Ukraine via the Red Cross at this horrific time. Please donate and share if you can, you will find the link here. Many thanks.
Three IE has signal near the border but not up the town. I'm on Three UK and it has good signal and you'll get 4G at times as well. Three UK let you use your calls, texts and date down south so it works out at great value if you're travelling over the border alot.