Upgrade from 4.4.2 to 6.0? - Nexus 5 Q&A, Help & Troubleshooting

Hey everyone. I know the best way to upgrade is to do a complete wipe and install 6.0 fresh, but i want to know if its technically possible to upgrade from 4.4.2 to 6.0 without wiping or losing data? thanks

Of course. Do not flash userdata.img.

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[Q] How to downgrade from Lollipop 5.0 back to Kitkat 4.4?

Recently upgraded to Lollipop 5.0 and it was a huge fail. Many of my apps are still unusable by this system. Is there anyway to downgrade it back to KitKat 4.4? My phone is clean, no roots or anything of the sort. Thanks in advance!
Unlock bootloader (wipes all data) and flash factory image. Only way

KK to 6.0

Hey people. Can someone point me towards how I can upgrade to Marshmallow from 4.4 without losing root? Additionally, what is my next option for restoring all of my apps with data? Apologies for the noob question - haven't been flashing things on my phone since Kit Kat.
What's the problem with rooting again? You can upgrade without losing data if don't flash userdata.img.
You can restore your user data with TB, adb,...
you don't need to restore data if you skip flashing userdata.img

[D2403] Back to 4.4.4 without data wipe

Is there a way to downgrade to 4.4.4 without data wipe?
The energy use of the software I'm not happy about it.

Need help upgrading to Marshmallow

I have XT1550 2 GB India retail version running Android 5.1.1
It is rooted and has TWRP. I want to upgrade it to MM, but I don't want to wipe the data. AFAIK, I can't use factory firware images without a reset. Is there a way to upgrade and keep all my apps and data?
Random_Tag said:
I have XT1550 2 GB India retail version running Android 5.1.1
It is rooted and has TWRP. I want to upgrade it to MM, but I don't want to wipe the data. AFAIK, I can't use factory firware images without a reset. Is there a way to upgrade and keep all my apps and data?
Click to expand...
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No. You will face too many issues if you keep data from a rooted 5.1.1 to stock 6.0.1
You need to make a factory reset before flashing. I would even advise you to wipe system and internal memory as well before flashing the 6.0.1 factory image

Can I update from 5.1.1 to a custom 6.0.1? How to keep data?

Hi,
I want to update to 6.0.1 Xtresolite but I wonder how can I keep my data? (I want to restore every apps & images on the updated version)...
When I update, should I make a factory reset? When Can I find a step by step from 5.1.1 to 6.0.1 ?
What do you think about Smart Switch?
When you are coming from 5.1.1 stock you can't install a 6.0.1 rom. You first have to upgrade to stock 6.0.1. Keeping data when flashing a custom rom is unlikely since a full wipe is required before flashing when you don't want to run into any issues/FCs.
@XxM4tzexX So I can update to 6.0.1 stock without loosing any data? How?
Flashing a stock Firmware via Odin.

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