Is there any tested method to mount Ext4 or NTFS partitions on Android 64 bits v5.1?

After long days trying to implement some filesystem that allows more than 4GB file size on my Jiayu S3 with a Xtreme ROM (not ROM stock, but still Jiayu official MOD) based on Android v5.1 64 bits, I have concluded that maybe, as for today (September 2015) there is no way to achieve this.

So, please, could someone successful on mounting NTFS or EXT4 (preferred) with a 64 bits Android version tell me how he did it?

I tried multiple tutorials (some from XDA) and apps, but they all fail.

[XT1033 INDIA] Issues with 5.0.2 solved in 5.1, as Tested by me

A. Phone, Router & Firmware info:
1. My Phone : MotoG XT1033 Asia [Nov 2013 Model INDIA]
2. My WiFi Router : DSL-2750U_ADSL_Modem (U1, IN_1.08)
3. Root/Mod Status : No Mods, Not Rooted (Normal)
4. Old Firmware : Lollipop 5.0.2 [220.21.28] Stock
5. New Firmware : Lollipop 5.1 [221.21.56]

6. Update method :

a) File "Blur_Version.221.21.56.falcon_umtsds.AsiaRetail.e n.03.zip" downloaded in PC. (file md5-checksum = 94856deaaa3f23a1163120b362cbaef10, 208.7 MB )
b) File copied to phone's sdcard/Internal memory.
c) "apply update from sdcard" thru phone's BootLoader/Recovery menu.

effect same as update thru OTA file, but safer.

7. Updated Date : Sep 12, 2015.

8. Status : Update successfully installed.
9. Post update actions : wiped cache partition (thru fastboot & recovery menu)
-------------------------------------------------------------------------------

B. Issues with 5.0.2 solved in 5.1 (Sep-2015), as experienced/Tested by me

1. WiFi re-connection issues after disconnect, with Channel-13 or auto-channel, earlier in 5.0.2.
(eg: when enforced WiFi disable/enable or by moving out/in of Wifi range).
These issues are solved in 5.1, even with Channel-13 selected (either manually or auto).

2. When an incoming call, is not picked-up even after screen timeout time (say 15 secs), then ringing stops, & display switches off. Accepting the call after this is very difficult. This issue is solved in 5.1

3. Gallery Application fails/ Misbehaves.
Albums/Videos, shows blank squares/Tiles. Problem temporarily solves on reboot, but only for one invocation. This issue is solved in 5.1

4. Two Photo icons in App Drawer. This issue is solved in 5.1.

5. The phone lagging response issues seems to be improved, if not altogethor solved.
At least it is more responsive (response time faster), and smoother to operate, than in 5.0.2.

But the final verdict on this can only be provided after some extended time of usage (say few weeks or more).
Earlier with 5.0.2 it was horrible, especially as time went by, and I was planning to revert to stock Kitkat-4.4.4.
So I want to know others experience regarding phone resposniveness w.rt 5.0.2 in 5.1

6. I am not facing any early Battery drainage issues in 5.1 w.r.t 5.0.2, as reported by some others.
In my opinion, if only it is better. But not sure (feedback only with couple of days usage)
Anyway surely not very bad than earlier.

7. CPU SpyPlus now reports 300 Mhz as min scaling freq, as against 787 Mhz in 5.0.2.
I am sot sure how significant this is. But some people reported this as a problem in 5.0.2
The highest reported freq is 1190 Mhz.

Incidentally some people are referring to this update as 5.1.1 instead of 5.1, here in these & related forums.
I am only seeing Android Version as 5.1 in : Settings --> About Phone Menu.
with Baseband version = MSM8626BP_1032.3116.98.00R and
Kernel version = 3.4.42-g89906d6

So I dont know whether Motorola is released or releasing any newer version 5.1.1 other than this one.
I think people are confusing this with 5.1.1.

I would like to hear other experts comments regarding this.

[PATCH][WhatsApp][Dubmash][SR] [5.1] [Video Fix] [Tested] All Android 5.1.1 ROMS

Hi Guys.....
Finally I made this Fix from Stock ROM and this is Tested on Euphoria and CM12.1 based ROMS. with this fix one can share videos recorded by your camera via whatsapp which was not possible on any custom rom if u try to share without this fix whatsapp crashes and dubmash never works.

INSTRUCTIONS:
1. Boot Into Recovery (TWRP) Recommended
2 Clear Cache and Dalvik cache
3. Flash the Zip
4. Clear Cache and Dalvik
5. Reboot and Enjoy.

Disclaimer:
Please Do take Nandroid Backup before Proceeding
I am Not responsible if something happens to your device

Thanks to @luca020400 for helping me with identification of file
Spl Thants to @VivaLaVent for extracting the files from Android 5.1 official firmware
Motorola for Stock Rom.
i used a single lib file from other device to fix screen recording which the stock file can't handle and causes screen recorder app to fc

Please Don't say than just HIT the Button :)

Attached Files

WhatsappFix V3.zip - [Click for QR Code] (486.4 KB)