A few days ago, we learned, thanks to XDA member mmian, that Windows Phone 7 Mango RTM 7720 was available for MS employees. One day later, XDA Retired Moderator itje re-posted the Mango RTM by LongShot442 for everyone who wanted it. This version is now updated with Chevron and more languages including Norwegian. Just be sure that your device is unlocked and supported before proceeding.
The developer mentions that you can’t update to 7720 when coming from DFT 7713 or 7714
Originally posted by itje
Here is the RTM 7720 Mango for your wp7, download link at bottom of this post
Please read post #2 to see how I keep chevron unlock and add my native language to RTM 7720
1. THIS IS NOT A GUIDE ON HOW TO KEEP CHEVRON UNLOCK, THAT IS NOW COVERED (ON A HD7) IN POST #2 IN THIS THREAD. THIS GUIDE IN POST#1 IS JUST A TRANSLATED/EDITED INSTRUCTION FROM THE GERMAN ONE IN THE RAR FILE.
2. THIS UPDATE IS NOT DESIGNED TO BE DEVICE SPESIFIC, SO BUGS BECAUSE OF OUTDATED DRIVERS ETC CAN BE PRESENT. AND YOU MIGHT NOT GET DEVICE SPESIFIC SOFTWARE TO RUN PROPERLY ETC ETC.
3. ITS FINAL MANGO FROM MICROSOFT, BUT CARRIERS/OEM’S NEED TO ADD THEIR “MAGIC” FOR IT TO BE AT IT’S PRIME
4. IF YOU DON’T KNOW THE BASIC OF HOW TO FLASH, THEN YOU NEED TO RETHINK WHAT YOUR DOING, AND READ UP IN THE DEV SECTION OF WP7
I’m quite sure that DFT will soon release a unlocked and ready to flash for all, so there is also the possibility to wait for their release :-p
I just reuploaded and repost here, the file comes from longshot442. Original thread here
I take no responsibility for whatever happens to your device.