Help me Identify my phone (Fake Note 2) topic

Hi, I posted this in another forum and was recommended to post here. A couple of years ago, I bought a Note 2 from craigslist then later found it was a fake. It was the same size, and model #, but quickly started finding fake stuff. Stylus was fake. Screen size was off, cell signal stopped working, etc. It's running android 4.1.1. (baseband version MAUI.11AMD.W12.22.SP.V7.P3,2012/12/27 11:22). AnTuTu Benchmark was preinstalled with fake specs. So, I can't trust any specs I see in Settings, my guess it's some Chinese phone disguised as Note 2.

So, How can I identify the exact specs of the phone in hope that I can install a new ROM or cyanogenmod on it.
Here are summarized specs using DeviceInfo app
[System]
Model: GT-N7100
Manufacturer: GT-N7100
Device: GT-N7100
Product: GT-N7100
Brand: samsung
Bootloader ver.: unknown
CPI ABI: armeabi-v7a
CPI ABI 2: armeabi
Hardware: mt6577
Radio: unknown
Kernel Version: 3.0.13
root@android )
#3 SMP PREEMPT Mon Jan 21 15:10:32 CST 2013
Build Number: ALPS.ICS2.MP.V1.3
Release: 4.1.1
SDK: 15

[Display]
Screen Size: 540x960
Density DPI: High (240)

[Graphics]
GL Renderer: PowerVR SGX 531
GL Version: OpenGL ES-CM 1.1
GL Vendor: Imagination Technologies

[Sensors]
[mmc328x Orientation sensor]
Vendor: Aichi Steel
[mmc328x 3-axis Magnetic Field sensor]
Vendor: Aichi Steel