来自xda论坛，不过鸟语不行，只能转载，大家看看就好，可以翻译就翻译一下 先附上原帖地址
http://forum.xda-developers.com/showthread.php?t=2713098

Hi there
Well, as we really need Interop Unlock for our Lumia phones, i decided to check this out myself.
As i already have ATF Box for a long time, i decided to buy JTAG activation and dolphin clip + lumia jigs, that i do not have to solder my phone.
Also i have ordered a Lumia 520 testing phone on ebay.

So, as the ATF Team made an awesome JTAG software update, i'm trying to interop unlock that Lumia 520 the hardware way, as just software seems to be too tough...

Well, what i did so far:
1. Freshly flashed Lumia 520 RM-914 with latest stock rom
2. Did the setup/beginning after turning it on for 1st time
3. developer unlocked it with SDK on PC
4. Made Full Dump with JTAG from dev-unlocked phone
5. Mounted MainOS partition of dump with program "OSFMount" (-->appears as Local harddisk example drive E: )
6.Loaded the SOFTWARE hive with regedit on PC from "E:\Windows\System32\config"
7. Edited the following values:
PortalUrlInt = ***链接停止解析***
PortalUrlProd = ***链接停止解析***
MaxUnsignedApp = 10003
8. unloaded SOFTWARE hive
9. unmounted dump-image
10. wrote image back via jtag

I thought it might be a good Idea to dev-unlock the phone before messing with the registry, to make sure "DeveloperUnlockState = 1" gets written the "legal" way, as the key is not available in registry before.
Maybe it's better to just modify an existing key, than adding a new one...


Well, long story short: The result is not totally satisfying.

After writing the modified image back to the EMMC, the phone is booting up, but i can NOT deploy homebrew apps that require interop unlock, like @GoodDayToDies "EnableAllSideloading.xap" for example.
But i can deploy "nomal" apps like @cpuguys "Toastlauncher" and @GoodDayToDies "Webserver"

The weird thing: If i check the reg-values via WebServer on the Phone, i can see my edited values.
So the changes ARE written to the phone. The phone just doesn't use them...

So, the good thing: phone is booting with modified rom
But, the bad thing: Changes are not working.


EDIT:

SUCCESS!!!
After adding

i could successfully sideload "EnableAllSideloading.xap"

After executing enableallsideloading i could sideload latest WPHTweaks build.

Now i have 3rd tile row enabled!


awesome!


Also member @myst02 is working on interop-unlocking the lumia phones. So we decided to make this a together-project.
See his achievements here: ***链接停止解析***