L720 domestic unlock, invalid sim


Operation: Unlock SPRNT
Selected model: SPH-L720
Selected port: COM38 SAMSUNG Mobile USB Serial Port
Software version: 24.2

Waiting ADB device… OK
Reading phone info…
Model: SPH-L720
Android version: 4.4.2
Product code: Not Active
Phone version: L720VPUAMDC
PDA version: L720VPUFNG2
CSC version: L720SPTFNG2
CSC country code: USA
CSC sales code: SPR
HW version: L720.08
Phone S/N: 00000000000
Modem board: MDM9615M
RF cal date: 2013.07.21
IMEI: 990003487327583
Initialization AT RIL… OK
Unlocking… OK
Rebooting phone… OK
Unlock done

Done with Samsung Tool PRO v.24.2

done this twice, still says invalid sim. can somone help?

baseband: L720VPUAMDC
android version: 4.4.2
build: L720VPUFNG2