The phone card I bought after getting off the plane has very poor signal ?
2 Answers
You can buy a British SIM card in China first, and then use it when you arrive. No problem. It's very convenient to buy a SIM card at the airport after you pick up your luggage.
3's network signal is okay, just occasionally no signal is not strange. Going straight from London to Edinburgh is the main road, and there will be signals. If there are some towns along the way, it's hard to say.