5th July 2012 at 19:03 #63687
yep, the MS can attempt a Location Update on any PLMN. And doing the LU requires a SDCCH.
whether the PLMN is allowed or not, i’m not sure what’s the impact. But this has to be hard coded in the SIM, which is probably not the case.
Don’t moan. ROAM. 😀