list of problems you may suffer from (not all users have all problems in the list ):
1. buttons backlight doesn't work
2. multitouch is buggy and stops working allot (when zoooming )
3. no autofocus in camera , and pictures are so bad
4. big noise in videorecording and very noisy voice
6. loud speaker is very loud
7.wifi mac address will change if you reboot the phone
8. charging problem when the device is off (magldr issue )
9.Support For 1024LEO full Capacity (currently limited to 512)
10. market takes allot of time to verify purchase and download (wp7 issue or just us ? )
11. battery meter not accurate at all, and very high battery usage
12. some htc applicaions doesn't work (audio booster ) works ut make no change
13. flash on camera and green tint
14. light sensor in extreme dark conditions (corrupted as in android ) needs testing not sure
15. rebooring problems
16.FM radio is very loud even with the volume on the minimum setting.
17. sync contacts names problems (may be wp7 )
18. service provider settings (like charge , pay pill ) in windows 6.5 and android doesn't exist (wp7 problem , may be ) .
19. digital compass , is it working or not and how to test it
20.mms, can't change apn for mms
21.No headset icon when headset is bluged
22.push tiles update issue
23.Only the left headset works when make call.
24. mic doesn't work when headset is bluged in
25. Phone remains "locked" after MS activation, no amount of unlocking works. *mod edit - try method 2 : here *
A. some issues are windows phone 7 related that we should wait for microsoft to fix them see the list here : http://forum.xda-developers.com/showthread.php?t=836373
B. I will request the next rom update to be an hd7 reg edited as default , so that we will only need to use the activation code without cracking the phones security with (chevron wp7.exe ) as with the next microsoft ypdate we will not be able to use it any more.
C. All problems are being repeated now , i think the list above includes it all ,one more day and i will be reporting all these issues on the chinees forum , or to cotulla ,