If your on the Orange or T-Mobile network then today is your lucky day.
They are currently both owned by one company, Everything Everywhere.
If you sign up using the relevant link and have no signal, your phone will automatically switch networks.
This is a brilliant idea and should make alot of customers very happy. Suddenly the capacity of both T-Mobile and the orange network have been increased!
Can only be a good thing for customers!
Let us know how your finding it in the comments section below.