Samsung Galaxy Note 4 N910A 4.4.4: Phone Not allowed MM#6

After write new cert and unlock, AT&T note 4 N910A displays this
message: Phone Not Allowed MM#6 when I put T-Mobile simcard. Any body
run to this issue before? AT&T works fine. I would appreciate your
input.







[ 4/28/2015 5:08:00 PM ] Operation: Write CERT

[ 4/28/2015 5:08:00 PM ] Selected model: SM-N910A

[ 4/28/2015 5:08:00 PM ] Selected port: COM35 USB Serial Port,

[ 4/28/2015 5:08:00 PM ] Software version: 20.5

[ 4/28/2015 5:08:00 PM ]

[ 4/28/2015 5:08:00 PM ] Checking certificate file... OK

[ 4/28/2015 5:08:00 PM ] KEY ID: 0772

[ 4/28/2015 5:08:00 PM ] Waiting ADB device...

[ 4/28/2015 5:08:00 PM ] Please, allow USB debugging on phone... OK

[ 4/28/2015 5:08:00 PM ] Reading phone info...

[ 4/28/2015 5:08:00 PM ] Model: SAMSUNG-SM-N910A

[ 4/28/2015 5:08:00 PM ] Android version: 4.4.4

[ 4/28/2015 5:08:00 PM ] Product code: SM-N910AZWEATT

[ 4/28/2015 5:08:00 PM ] Phone version: N910AUCU1BNK3

[ 4/28/2015 5:08:00 PM ] PDA version: N910AUCU1BNK3

[ 4/28/2015 5:08:00 PM ] CSC version: N910AATT1BNK3

[ 4/28/2015 5:08:00 PM ] CSC country code: USA

[ 4/28/2015 5:08:00 PM ] CSC sales code: ATT

[ 4/28/2015 5:08:00 PM ] HW version: REV0.2

[ 4/28/2015 5:08:00 PM ] Phone S/N: R38FB127PAJ

[ 4/28/2015 5:08:00 PM ] Modem board: MDM9225M

[ 4/28/2015 5:08:00 PM ] RF cal date: 2014.11.24

[ 4/28/2015 5:08:00 PM ] IMEI: 3XXXXXXXXXXXXXXX

[ 4/28/2015 5:08:00 PM ] Initialization AT RIL... OK

[ 4/28/2015 5:08:00 PM ] Bypass MSL... OK

[ 4/28/2015 5:08:00 PM ] Checking for compatible phone and cert... OK

[ 4/28/2015 5:08:00 PM ] Phone KEY ID: 0772

[ 4/28/2015 5:08:00 PM ] Writing CERT... OK

[ 4/28/2015 5:08:00 PM ] Checking CERT status... OK

[ 4/28/2015 5:08:00 PM ] Rebooting phone... OK