User of Two Mobile Broadband Networks

Hi,

I subscribe to both T-Mobile and Orange mobile broadband because when one network is unavailable or very slow, I can switch to the other and this has worked quite well so far.

With the merger of these two networks, presumably they will eventually both be usuing the same masts and there will be no point in continuing to subscribe to both. Does anyone know when this point is likely to be arrived at?

Thanks in advance for any information on this.