[Galaxy Note 4 Q&A, Help & Troubleshooting] matrix_drumr:
Hi, I am new here. I hope I don't post something too obvious but I don't think it is since there are many specifics. I also hope this is in the right section of the forum, feel free to move it elsewhere if it is not. There is so much information going on that I'm a bit lost.

So I bought this samsung galaxy note 4 on kijiji a couple months ago. I noticed strange memory anomalies when I started to really understand the phone. I had to take it to a repair center because I thought I didn't have access to the full memory. The guy said this phone was either not from here (I'm from canada/quebec and I bought it in montreal) or it was a clone. It is so identical to a real one I would not have doubted it because it was the first time I had one in my hands. Yesterday I googled a bit on differences between real and fakes and I think it is a fake according to this youtube video from techmagnet: Fake vs Real Samsung Galaxy Note 4 - New Version - Best chinese 1:1 Replica for 150$ ? [HD]

Sorry I can't post the link since I'm new. Just copy paste the tilte.

It is pretty much identical to his fake so I guess it's the same. They have almost same informations. So first thing is it had only 16gb when I bought it instead of the 32 announced and is stuck on kitkat 4.4.4 while there is supposed to be a lollipop update I believe, maybe even marshmallow I'm not sure. So now that I know that, it doesn't bother me too much that it is fake because it runs very smoothly and properly. Now what I am wondering is how can I indentify what's really under this cover and can I update it. According to the video, the guy says there should be no problem. But I have never updated a galaxy note 4, my last one was a optimus black so nothing to compare. I have also never flashed or used custom rom or rooted a phone but I heard they can be faster, more stable (not that the one I have is not, it is perfectly stable) and with more options. I don't know if someone can confirm the real benefits of upgrading my phone.

Now if it is possible to do so I would gladly share the necessary information to help find the right firmware. So what information do I need, how do I find it and which rom should I run on this phone. There seems to be a lot of them and I don't know any of them actually. I have already the apps used in the video(cpuz, geekbench 3, and android assistant if this is what I need but they give different informations on some of the phone infos.. From what I learned from the repair store, the canadian firmware should be SM-N910c if I remember correctly but I'm not sure. But this phone says N910F which is why I thought it was simply a european model at first that was maybe stolen and sold back here because the IMEI was good. The guy at the repair store told me he was reluctant to change the firmware himself because he feared he might break the device with the wrong stock firmware, something I think should not happen with a custom one? Anyway he just reset my phone and I ended up losing memory because now it shows 4gb instead of 16 that should have been 32 in the first place, but I assume since it is a clone it must simply have 16.

Last thing I want to know is the guy who sold me the phone told me he had unlocked it for it to work on every network companies. I'm currently with koodo/telus. Can updating my firmware block it again, like erase the unblocking? Or is it safe? I assume it is possible that custom roms just unlock the phone anyway but I am a noob at this.

From what I can tell you at first those are the information I think might be usefull but I don't know if I need more. I'll just take the lead and share what I think might be useful:

Cpu z says I have qualcomm Snapdragon 800 3.00 ghz but Geekbench says I'm not actually going that fast.

It says 4 cores, should be 8 if it was a real note 4 I think

krait 400 architecture

revision r0p3

Gpu: Adreno (TM)330

(SM-N910F)

Board: APQ8084

Hardware: MT6582

Kernel Architecture: armv7l

Kernel version: 3.4.67 (N9100ZCU1ANIF)

System says 3000 of RAM but geekbench says I'm not actually reaching that.

And system, android assistant and Cpu z doesn't seem to agree on the amount of internal memory I have. Cpuz does say I should be having 16gb so I think a firmware update should give me back those extra gb right?

Sorry there are lots of questions but I need proper guidance to get me in the right direction. I hope this is enough information. Once I get to know which rom to use and the proper steps of installation I should be able to find my way.