I've recently moved and get no signal with my current provider (ID), so have been trying different sims for the best signal before I choose a new contract. 

I've currently got my provider's Sim card in and have just put another sim in (EE) but it is only showing the new sim I've put in, in settings. Yet when I pull down the icon screen from the top where it shows settings etc and the sim in use, it's showing its using my current provider as the main sim. I'm lost as to what's going on.