win 10

http://techcat.ca/threads/windows-10-phone-preview-install-guide-for-lumia-920-930-and-others.109/
Windows 10 Technical Preview for phones video guide



Windows 10 for any Lumia phone step by step guide

1. Download the Windows Insider app.
Press ... > about > make sure Sys free space is 300MB or more.
If there isn't enough space, make full reset with Windows Phone Recovery Tool.
2. Go to

Code:

upwp10.chinacloudapp.cn:7777

Download and install certificate.
3. Edit WiFi connection, enable Proxy

Code:

upwp10.chinacloudapp.cn
7777

4. Open Insider app, click get builds
5. You will get Enroll page, do not Enroll yet!
6. Switch to WIFI settings, turn off proxy.
7. Switch to Windows Insider app and now you can enroll for Windows 10 Technical Preview.
Choose Fast option.
8. Check Settings > Phone update.
If it can't find updates, you may need to reboot your phone and enroll again (without a proxy now).

You should not try this guide on any other brand phone than Nokia Lumia.
It won't work on HTC, Samsung and may even brake your phone!
Lumia 5xx does not meet minimum specs for Windows 10 Update.

Windows 10 Technical Preview for phones (9941.12498) on Nokia Lumia 920.



How to revert back to Windows 8.1?

Use official Microsoft Windows Phone Recovery Tool.
It will reflash your phone with fresh Windows 8.1.

You can backup all SMS, settings to Onedrive too.
Settings > backup > check things to backup.

Confirmed working models:
Lumia 1520
Lumia 1320
Lumia 1020
Lumia 930
Lumia 925
Lumia 920
Lumia 920 at&t
Lumia 820
Lumia 638
Lumia 620
Lumia 520

Did not work:
Lumia 530
Lumia 535
Samsung ativ s
HTC 8X