which Galaxy Note 3, 4, 5 could support latest Android with battery removable ?

My Galaxy Note 2 can be upgraded to the highest version of Android 4.x only.

I like Notes as it comes with fine-head stylus and fits my palms just nice but I need to upgrade to higher versions as some of my company sites can't be accessed unless I upgrade to higher versions of Androids (for security reasons).

I need to make a few decisions on whether to get used Note 3, Note 4 or Note X based on a few questions below which I need experts to answer:
a) I heard newer model phones nowadays dont allow batteries to be changeable so does Note 3, 4 or 5 allow batteries to be taken out & replaced?
b) which models of Note allows upgrade of Android to the current latest available versions?
c) which of the Note 3, 4, 5 has a width that is the same or 1mm wider only (but not narrower) than Note 2
sunhuxAsked:
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Jackie ManIT ManagerCommented:
a) I heard newer model phones nowadays dont allow batteries to be changeable so does Note 3, 4 or 5 allow batteries to be taken out & replaced?
Note 3 and Note 4 allow batteries to be taken out & replaced

b) which models of Note allows upgrade of Android to the current latest available versions?
None of them allow upgrade of Android to the current latest available versions.

Only Note 5 is able to update to Android 7.0.

c) which of the Note 3, 4, 5 has a width that is the same or 1mm wider only (but not narrower) than Note 2
None of them are the same or 1mm wider
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sunhuxAuthor Commented:
Does Note 3 or 4 allow upgrade to Android 6.X  (as 6.X is good enough but 4.X Android is way too old)
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Jackie ManIT ManagerCommented:
Does Note 3 or 4 allow upgrade to Android 6.X  

Note 4 can, Note 3 cannot.

But, you need to post back the exact model no first. Not all models of Note 4 can update to Android 6.0.
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sunhuxAuthor Commented:
I got the Note4 with me now: went to Settings & took me a while to find "About Device" (scroll right to the bottom),
& it says
a) Model number  : SM-N910G
b) Android version: 6.0.1
c) Security patch level: May 1, 2017
d) Baseband ver: N910GDTU1DQD3

So whats the latest version I can go up to?

Also, I'll need to backup from my old Note2 (which now gives me blank screen but my Win7 laptop could now detect
it after several times of "high power surge on USB" reported) data  (including Whatsapp messages, SMSes, Contacts,
Calendars/reminders, photos/videos and a couple of apps) over to this Note4
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Jackie ManIT ManagerCommented:
So whats the latest version I can go up to?

It is already running the latest version of Android OS for Samsung Note 4.

Also, I'll need to backup from my old Note2 (which now gives me blank screen but my Win7 laptop could now detect
it after several times of "high power surge on USB" reported) data  (including Whatsapp messages, SMSes, Contacts,
Calendars/reminders, photos/videos and a couple of apps) over to this Note4

Please close this question first and ask a related question. Thanks!
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Jackie ManIT ManagerCommented:
If you have no further questions, please do a favour to close this question.

Thanks!
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