I'm currently with Giffgaff and there are a few niggles but I find it generally ok.
I'm thinking of trying out Plusnet as they are offering a tempting package to existing Plusnet Internet customers.
My query is, can I subscribe to Plusnet Mobile, stick the SIM in a spare phone to trial it for a month, then If I am happy with the Plusnet service port my existing Giffgaff number to Plusnet? Or do I have to port my number at the time of subscribing ?
If I'm not happy with the Plusnet Mobile service then just cancel after a month and not bother with number porting?