Transfer Sky number to another Sky SIM

[Mark+Lawrence+72]

I have just received and activated a new Sky SIM with double data when ordered with a new phone contract. I want to transfer the number from an existing SIM which I will then cancel as it is out of contract. I have tried transferring with PAC code but it comes up with an problem (I have read that PAC only works between different suppliers) I cannot seem to transfer the number from the Manage Sim on the Sky Mobile portal. Contacting Sky Support during the day is problematic so would rather do online if possible

[GD1]

@Mark+Lawrence+72  You can't swap numbers between Sky sims.  You will need to call Sky cancel the new sim & transfer the data deal to the old sim.