Has anyone ever experience using the Gevey for the CDMA iPhone 4S Works fine with carrier version 11.0 but after the carrier was updated to 11.3 it no longer works.

Is there a way to downgrade the carrier setting on a CDMA (Verizon) iPhone 4S from 11.3 to 11.0

Also I noticed that when using the Gevey the phone actually uses the carrier vf nl 11.0 Which im assuming is Vodafone Netherlands? instead of the Verizon Carrier.