Hey smegheadsteve, thank you for reaching out, I am sorry to hear of the signal problem lately.
Okay, so yes we have begun the Migration of our customers over to the O2 network.
However if you made any changes recently this should migrate you on the O2 network right away.
Unfortunately once this is done there is no way to be put back on the old network, so I am sorry about this. Thanks
Matt - Forum Team
New around here?