Please configure the following rules for Windows 8 phones on the CLI of WLC controller:

set device-fingerprint windows-phone8 device-group windows-phone

set device-fingerprint windows-phone8 rule 1 type dhcp option-list EQ 53,61,12,60,55

set device-fingerprint windows-phone8 rule 2 type dhcp option-list EQ 53,61,50,12,81,60,55

set device-fingerprint windows-phone8 rule 3 type dhcp option-list EQ 53,61,50,54,12,81,60,55

set device-fingerprint windows-phone8 rule 4 type dhcp option 55 EQ 1,15,3,6,44,46,47,31,33,121,249,252,43

set device-fingerprint windows-phone8 rule 5 type dhcp option 60 EQ “MSFT 5.0”

set device-fingerprint windows-phone8 rule 6 type dhcp option 12 CONTAINS Phone

set device-fingerprint windows-phone8 rule-expression “((1 or 2 or 3) and 4 and 5 and 6)”