Will we have to go to every connected CPE and replace the SIM card?
No, the SIM cards are registered with the EPC. The eNodeB’s are the hardware bridge between the two.
Do you have a link where I can listen/watch the webcast? I missed the first part of it.
I think, in the case of a PCI lock, you can just edit the PCI value on the new base station to match the PCI value of the old one, which would allow all UE’s to re-attach without revisiting each UE.