Samsung N900P domestic unlock for U.S. gsm network, INVALID SIM still

Please I need help, I tried to unlock this via first DOMESTIC UNLOCK ( successful ) but still LOCKED say " INVALID SIM " and next I tried to unlock via UNLOCK button ( successful ) but still LOCKED say " INVALID SIM " using AT&T or T-Mobile U.S.A GSM simcard. Please need your help team! thanks

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To connect SM-N900P phone you have to perform the following steps:
1. Disconnect USB cable from phone.
2. Go to Menu->Settings->More->About Device.
3.Tap on "Build number" 7 times to enable developer options.
4. Go to Menu->Settings->More->Developer options.
5. Turn on "USB Debugging" option.
6. Go to dial window.
7. Enter "*#0808#" number.
8. Select "DM+Modem+ADB".
9. Press Home button.
10. Restart phone.
11. Press "Read Info" in software.
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Platform: Samsung Android
Selected port: COM159
Selected model: SM-N900P
Detected phone model: SM-N900P
Firmware compiled date: Tue Mar 18 14:18:12 KST 2014
PDA version: N900PVPUCNC5
CSC version: N900PSPTCNC5
SW version: N900PVPUCNC5
Phone IMEI: 990004474584XXX
Phone SN: 00000000000
Android version: 4.4.2 (KOT49H)
Sales code: SPR
Country: USA
HW platform: msm8974
HW Chip: MSM8974
HW Modem: MSM8974
Codename: hltespr
Checking Root:
Phone is not Rooted.
Installing service app…
Unlocking phone…
Finalizing…
Phone is successfully unlocked
To finish the operation, please restart the phone via phone’s menu.
Performed by 2.3.3 software version
———————————————————————————–
Platform: Samsung Android
Selected port: COM159
Selected model: SM-N900P
Detected phone model: SM-N900P
Firmware compiled date: Tue Mar 18 14:18:12 KST 2014
PDA version: N900PVPUCNC5
CSC version: N900PSPTCNC5
SW version: N900PVPUCNC5
Phone IMEI: 990004474584XXX
Phone SN: 00000000000
Android version: 4.4.2 (KOT49H)
Sales code: SPR
Country: USA
HW platform: msm8974
HW Chip: MSM8974
HW Modem: MSM8974
Codename: hltespr
Checking Root:
Phone is not Rooted.
Installing service app…
Unlocking phone…
Finalizing…
Phone is successfully unlocked
To finish the operation, please restart the phone via phone’s menu.
Performed by 2.3.3 software version