samsung l600 unlock

Operation: Unlock SPRNT
Selected model: SPH-L600
Selected port: COM279 SAMSUNG Mobile USB Serial Port
Software version: 26.7

Waiting ADB device… OK
Reading phone info…
Model: SPH-L600
Android version: 4.4.2
Product code: Not Active
Phone version: L600VPUBOH1
PDA version: L600VPUBOH1
CSC version:
CSC country code: USA
CSC sales code: SPR
HW version: L600.04
Phone S/N: 00000000000
Modem board: MSM8930AB
RF cal date: 2013.10.19
IMEI: 99000435587893
Initialization AT RIL… OK
Unlocking… OK
Rebooting phone… OK
Unlock done

Done with Samsung Tool PRO v.26.7
IT STILL GIVES ME INVALID SIM AFTER THE PROCESS
ANY HELP WOULD BE APPRECIATED