samsung n900a no signal issue

I have a samsung note 3 att N900a with null/null problem. I am able to fix the imei by downgrade and write cert on it. Then I write good qcn on it but I still have no signal problem. Did I miss something?? thank you for your help

Welcome to Octoplus/Octopus Box Samsung software version 2.1.8
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To connect SM-N900A 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: COM61
Selected model: SM-N900A
Phone was not found on the selected port!
Searching for USB diagnostic port…
Connecting to phone on COM1091
Mode: Normal
Phone model: SM-N900A
Firmware compiled date: Jan 02 2014
Firmware compiled time: 10:00:00
Firmware released date: Jan 4 2014
Firmware released time: 16:49:46
Phone IMEI: 357780-0
SW version: M8974A-AAAANAZM-2.0.10017
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Platform: Samsung Android
Selected port: COM1091
Selected model: SM-N900A
Reading info…
Mode: Normal
Firmware compiled date: Jan 02 2014
Firmware compiled time: 10:00:00
Firmware released date: Jan 4 2014
Firmware released time: 16:49:46
SW Version: M8974A-AAAANAZM-2.0.10017
Send SPC…
SPC send successfully
Writing QCN…
Writing NV items…
NV items write successfully
Writing NV SIM1 items…
NV SIM1 items write successfully
Writing NV SIM2 items…
NV SIM2 items write successfully
Wrting EFS…
EFS write successfully
Writing provisioning items…
Provisioning items write successfully.
Writing QCN done
QCN write successfully
Please, restart the phone to apply changes