Sph-l600 ( unlock )

i have L600 trying to unlock it to use with T-Mobile Or At&t .

Baseband version OH1 4.4.2

The phone is already rooted .

the software says unlock done . but i still get invalid sim card

is theres a way to unlock this phone or no?

Reading phone info…
Reading IMEI… OK
IMEI: 990004474990342
Unlocking… OK
Reseting… OK
Unlock done
Done with Samsung Tool PRO v.24.2