[HD2 Android Q&A, Help & Troubleshooting and Genera] hardik119:
I am updating this post constantly with all the solutions that I find useful so please keep checking the first post.

Details of my Phone

Model: T-mobile US with 16GB class 2 card

Windows ROM: Energy WinMo ROM 01/08

Android ROM: Mattc Froyo 1.5

Radio: 2.12.50.02_2

1. Possible solution for Random freezes

As everyone is discussing here, Random freezes are caused by the G-sensor so I decided to do some experiments on my own. Here's what fixed my problem.

Go to Windows mobile-->settings-->system-->G-sensor, Put your phone on a leveled surface and hit the calibrate button. Now shut down and boot to Android.

This fixed the problem of random freezes on my android. Try this and let me know if this works.

Some users also reported that disabling Auto-rotation option in Android display settings solves the problem. But when I tried it, it didn't work for me. But worth a try since it did work for some users

If none of the above two work please try the following solution at your own risk. Some users reported that this has messed up their system and had to re-install WinMo but most of the people got it working with this solution.

1. Back up your registry

2. In windows mobile go to Registry Editor, search for "gsensor.dll" and remove the whole keyset. Reboot your phone. This step should disable your Gsensor in WinMo but it will still function in Android.

Please share your experiences after doing so.

Another possible solution(credits to ......)

Install flip n shake app from the market place ,go to advanced setting and change the sensitivity.

Please report if it worked for you or not.

There are many reasons for the freezes but the most common one should be solved by one of the above solutions.

1a. Momentary unresponsive touchscreen (hard buttons work but the touchscreen doesn't)

Theory behind the touchscreen insensitivity

The Gsensor drivers in Android are unstable and momentarily it uses a lot of CPU randomly and thats when you get the momentary touchscreen insensitivity.

Temporary solution 1(Credits to shadiku for the development)

The quickest solution would be to disable G-sensor completely. And it works 100%. Use the Kernel developed by shadiku which disables G-sensor completely. Click here for more info

Temporary solution 2(If you don't want to disable G-Sensor)

This solution won't fix the freezes 100% but it will reduce the freezes to a considerable amount.

1. Using setCPU overclock your phone to 1.1 GHz(or whatever highest frequency available). Create profiles as you wish but make sure to put all profiles to conservative mode.

2. Disable "background data" by going to Account & Sync settings.(So there would be minimum load on CPU)

3. Kill all running applications (every hour) using Advanced task killer.

4. Disable Auto rotation.

All the steps mentioned above will surely help you with the battery life as well. You will still get some rare touchscreen freezes like once every two or three hours. But it is very very very less compared to once every 5 to 10 minutes before doing the tasks above. This is due to more CPU available for the culprit application (Gsensor driver)

2. Poor battery life

This isn't my work. This is copied from Bakedbread's thread here

1. Install BSB tweaks 1.6 and turned ON "Power Savings"

2. Go to registry editor and edit the following keys as under

HKLM\Comm\AsyncMac1\Params

DisablePowerManagement=0

HKLM\Comm\PPTP1\Params

DisablePowerManagement=0

HKLM\Comm\L2TP1\Params

DisablePowerManagement=0

HKLM\Drivers\SDCARD\ClientDrivers\Class\SDMemory_C lass\High_Capacity

DisablePowerManagement=0

HKLM\Drivers\SDCARD\ClientDrivers\Class\MMC_Class\ High_Capacity

DisablePowerManagement=0

HKLM\Drivers\SDCARD\ClientDrivers\Class\SDMemory_C lass

DisablePowerManagement=0

HKLM\Drivers\SDCARD\ClientDrivers\Class\MMC_Class

DisablePowerManagement=0

It helped me. so try your luck.

Also some people have reported that underclocking(using SetCPU or other programs) help in increasing battery life too.

Changing to the latest kernel also helps with battery life. Please find below the procedure for changing the kernel.

1. Download latest Kernel(zImage) from here. You need to download the regular one and not the usbhost one.

2. Rename the downloaded file to zImage.

3. Go to your phone's android folder and rename the zImage there to zImage.old(just incase the newer zImage gives you trouble). Copy the downloaded zImage to the Android folder.

4. Boot Android.

Trouble booting or connecting to wifi after updating to the latest Kernel?

check out the post here for booting problem. and checkout the post here for wifi problems.

Here is also another observation. When you charge the phone in Android it doesn't charge fully(even though it shows 95% or 96%) and it drains the battery really quickly. If you charge the phone while its switched off or while its in WinMo the battery life seems to be improved. But I need some confirmations for this from users.

Check out this thread as well regarding standby current which affects your battery life as well.

http://xdaforums.com/showthread.php?t=770903

3. SoD(Sleep of Death)

I had the problem of SoD while using 2.09.50.02_2 radio. Once I changed my radio to 2.12.50.02_2 the problem of SoD was gone. Please try changing your radio and report back.

If changing radio doesn't help then try this it might help (Credits to fi3ry_icy)

http://xdaforums.com/showpost.php?p=7531752&postcount=16

Also another possibility is in WinMo change the sleep time to never/maximum possible and see if that helps.

4. WSoD(White screen of death)

Not my work. Not sure whose finding this is.

When u get stuck at white screen while rebooting open startup.txt and change set cmdline to set cmdline "rel_path=Android lpj=638976" and reboot again.

Edit: If the lpj=638976 is already there when you open the startup.txt and you are getting WSoD then try removing "lpj=638976" from the line and reboot.

Another possible solution(Credits to ....)

copy the whole sdcard (backup to PC), format it the with 'SD formatter' (total write, erase and format process) and afterwards, start with a fresh install of the android folder. Copy all other folders back from the backup.

do not use automount in android, but only use 'diskdrive option' when booted back to WinMo if you want to transfer files to the SD card. If you need to transfer smaller files to SD while in Android then use a wifi file explorer(Search market place for one that suits you).

5. Robotic voice

I believe this problem is associated with the combination of WinMo and Android rom. Changing the WinMo rom helps get rid of this problem. So try new combination until you find one thats working.

It is said that Windows mobile Base rom 2.14 and higher does not cause this problem. Users have reported that they had the problem with 2.14 and when they tried 2.13 it eliminated the problem. So not sure if it has anything do with the Base ROM or not. But one thing is for sure that it is the combination that creates/solves the problem.

6. Taking long time to wake up from stand by

When pushing the end call button on ur mobile, it will go in standby and when u push it again, u get lockscreen.

7 off the 10 times it take a few seconds for the screen to wake up, and sometimes it freeze longer (5seconds).

Possible solution:

The problem is caused by Advanded task Killer. here's what solved my problem of screen not coming back on for couple seconds.

In advance task killer I changed the "Auto kill frequency" to 30 minutes instead of "when screen off" and it solved the problem.

If you want to try different lock screen go to market place and download 'finger scanner lite'. I know its a stupid program but at least something to experiment with.

Another temporary solution(Credits to Bazman123)

try pressing the power button for a few seconds, this will bring up the shutdown screen kicking your phone back into life instantly.

7. Unable to mount SDCARD error

Thanks to shu8i for solution

If you get unable to mount sdcard plz replace set cmdline "rel_path=Android" with set cmdline "rel_path=Android loop_partition=mmcblk0" in startup.txt

8. Mount SD card to PC for file transfer

I knew this trick since the days of Kaiser Android but never needed to use it on my HD2 but for anyone who wants to mount the SD card to PC for file transfer here's a quick trick.

Download and install "Auto Mount Your SD Card" made by JR Studio from market.

Unplug your phone

Open the Auto Mount App

Check Enable SD Card Auto-Mounting and exit the app

Plug the phone in

Or you could just use a wifi file explorer type program for transferring small files.

9. Error while installing certain apps

There are some particular apps which gives an error while trying to install (e.g. Neocore)

All you need to do it go to setting and unmount the SD card. Install the app and remount the SD card and you are good to go.

If you find anything wrong or if you want me to add your solutions to this post. Please PM me.

Also check out the third post below by fi3ry_icy for more solutions.