pls help i unlock SGH-I437P after i insert the sim the phone showing enter code

Chimera Mobile Phone Utility version: 10.71.1154 @ 2016-07-08

[Unlock phone started]

Gathering phone info…
Collecting information. Be patient! Do NOT disconnect the phone!
Model: SGH-I437P
Sales Code: ATT
Country Code: USA
Timezone: Pacific/Guam
Android Version: 4.1.2 [JZO54K]
Build Date: Wed Jul 10 11:15:25 KST 2013
PDA Version: I437PUCBMG3 [july 2013, rev3]
Phone Version: I437PUCBMG3 [july 2013, rev3]
CSC Version: I437PATTBMG3 [july 2013, rev3]
Product Code: SGH2I437ZSCATT
HIDSw Version: I437PUCBMG3/I437PATTBMG3/I437PUCBMG3/I437PUCBMG3
Board Platform: MSM8960
Modem Platform: MSM8960
Serial Number: R38F31F0CKX
Imei: 357182051821374
Connections: AT,MTP
Battery Status: 3.93V (58%)
Network Type: GSM
SIM Status: ABSENT

Checking root state…
Not rooted.
There is no backup, because there is no root access.

Unlocking…
Trying on SAMSUNG Mobile USB Serial Port (COM146)
Unlocked.

Finished successfully.
Finished at local time: [07.08.16 09:09:58]
WorkID: 11923365

hi pls help
pls help i unlock SGH-I437P after i insert the sim the phone showing enter service provider code