4G/LTE - Attach Reject

Attach Reject

Followings are about the expected UE response to the attach reject with a specified reject cause. I think just illustration is good enough and would not need any further explanation.

Cause  #3 'Illegal UE' - multiple PLMN

Cause  #6 'Illegal ME' - multiple PLMN

Cause  #7 'EPS Service not allowed' - single PLMN

Note : If you power cycle the UE will retry camping on.

Cause  #14 'EPS Service not allowed in this PLMN' - single PLMN

Cause  #14 'EPS Service not allowed in this PLMN' - multiple PLMN

Cause  #15 'EPS Service not allowed in this TA' - multiple PLMN

Cause  #25 'Not Authorized in this CSG' - multiple PLMN

Note : 24.301 5.5.1.2.5 states as follows.

EMM Cause #25 is only applicable when recieved from a CSG cell.

EMM Cause #25 recieved from a non-CSG cell is considered as an abnormal case.