Re: Mobile banking: alarm as fraudsters take over handsets and raid accounts

Tweed wrote:

It’s usually a sim swap fraud. Somehow convince the mobile operator to port
the number to another mobile operator where the new sim is in the
possession of the fraudster.

Whenever I've requested porting my number to a different operator, I've received texts giving 24 or more hours notice to port.
Which operators *don't* operate such a safeguard?