[Windows 10 Mobile] LPhoneChump:
First of all hello to all and many thanks to hikari_calyx.Seeing he is from Wuhan i wish him good health.May God protect him.

I ve searched for ways to upgrade my Lumia Phones to newer builds a lot and thanks to this guy, i have managed to put on my phones 170x W10 builds from last year just fine.

I ve used the beta 4 version to upgrade my older 512mb phone just fine, as per instructions in this thread and youtube video.

To upgrade a Lumia 532 with 1Gb of RAM, only the interop tools folder is needed (if you already have a W10 build -14393 usually), no need to revert the phone to older versions, reinstall 8.1 or whatever.

On the Lumia 6xx with 512mb after you aquire the latest update for 8.1, via the Official Reset Tool-Phone Recovery, needed for the offline upgrade itself practically as well, and you upgrade offline to the build included, you just copy the Interop Tools folder, execute the files and load the registry as per wish.I was able to use either the 638 profile as well as the 640 or 950.I did it in order.For the 532 i have tried 640 until it required no more updates, then i reset the phone and loaded again the interop tools (careful with the developer mode, dont forget to enable it) and using 950 upgraded to 1709, then again loaded without any reset and it went to the last 1709 - 2020 update with no biggy.

For the 6xx i ve just stopped on the last 1703 build, from june 2019, as it looked the least power hungry after the one you flash offline.Not sure i want to go for the 1709 though as if i dont like it i would have reset/revert the phone to 8.1 again and another day would be spent getting back :).

Do not use 14393 build on any phones you have, it s junk and overheats them, i have used it with my 532.Go further after you got it.

First things i ve observed with 170x builds is that the charging does not overheat the phones, the WI-FI speed is higher and that after tweaking the background apps and privacy settings, mostly the Microsoft reporting features, the phone runs quite ok power wise and heat wise.It simply runs cooler for usual casual tasks, music play for example.

Even if you have 512mb phone go for the 170x builds via the interop.The January 2019 (not the February 2020) build for 1709 is not bad either.

You can use the Enterpise trick, from the 4.1 package as well to get the last versions.

What i ve observed is that 10.0.10586.xxx will provide the Radio FM App that you have in 8.1 , but the reception is better.Once you go from 1511 to newer build you will need to download a FM Radio app(there is one) as the official one will be gone.The same build will activate at any phone restart the VPN settings even if u turn them off previously.The music sound quality with 10.0.10586 seems though a little under the newer builds, while the 5Megapixels camera made pictures noisier than newer builds at low light.The Store will give you almost no Apps. :)

I would avoid the 10.0.14.393 builds, the "heater" builds in my view.

Upgrade from the initial 10.0.10586.1xx provided here via WI-FI.Use another phone, if needed, to have internet connection and connect to that one via WI-FI.

It s extremely simple and easy to go for the 170x builds and you should do it, the tools provided in this thread starter are all you need, just pay attention to what is described.

After you upgrade to the latest 8.1 version and firmware use the tool, ignore the logging errors, follow the instructions and DO NOT DISCONNECT phone from PC until the tool tells you to do so.It takes an hour or so, so be patient.As the files were pushed and you see the in the phone update the graphics with the update evolution just wait for it to finish.The play with the Interop or Enterprise stuff.You can always revert to the 8.1 build with the official tool and start over, after you charge the phone and let it cool.

Many thanks to hikari_calyx.I simply find the Android phones unfitted for my taste so if this thread prolongs your phone life why not to try :)

Once you load the latest build via WI-FI you can reset the phone to the clean state of the version you ve upgraded to or whatever, there is no apparent danger security wise whatsoever.

Just do it ! :)

Upgrade your phone ! :)

---------- Post added at 10:40 PM ---------- Previous post was at 10:15 PM ----------

You want to go for the 170x builds or you just want to look at the logs ? :)

Ignore the logging errors if you get the build at the end of one hour or so . :)

Make sure you use a USB 2.0 port on the PC.