[AT&T, Rogers HTC One X, Telstra One XL] mgfjd:
HTC responded my letter and this is my answer back to them.

David,

I appreciate your response on these issues. Even if I decide not to keep the phone, I think it is great HTC tries to help and provide customer service. I am a first time HTC user and I am trying to learn about the phone.

Multitasking:

http://www.androidauthority.com/htc-one-x-issue-breaks-android-multi-tasking-85598/

http://www.androidcentral.com/multitasking-htc-one-x-isnt-broken-its-customized

http://xdaforums.com/showthread.php?t=1646409

I have done the same testing with my Samsung Captivate CM9, Samsung Galaxy II, Sprint Galaxy Nexus and they all can handle the android multitasking with no issues.

Personally my problems with the AT&T HTC phone are:

I am a mountain biker and road cycling. I use Runkeeper to track my workouts but during rides I stop to take pictures, send a mms, take a phone call and return to my ride. The HTC phone restarts Runkeeper losing my workout information. I have never had a problem with the Samsungs.

I handle office e-mails and quick office documents on the go. I copy data from quick office and paste the info in a text message. back to quick office for more data to copy but returning to the text message app, my previous info is gone because the application has been restarted. I have never had a problem with the Samsung Phones.

When I play games, going back to the home screen to send a text and trying to go back to the game. The game is re-started. My Samsung phones return to the game from my last move. No application re-starting.

One of the biggest selling point for the HTC ONE X is the 1gb memory capacity why isn't properly use?

Camera:

The picture quality is good but not great. I have to use auto enhanced from the gallery to make the pictures look good. I have to disable sharpness because it is too high. I have play with all the camera settings but still I don't get great pictures.

I usually take pictures during my mountain bike expeditions. When I take pictures of others bikers moving, the camera has a lot issues focusing and most of the time my pictures are blurry. The camera focus is great when no one is moving or objects in static position.

I have downloaded the vignette application from the market and the settings in the app somehow take better quality pictures than the built in software. Auto enhanced does minimal changes to the pictures when using Vignette, the pictures just look great.

Front face Camera:

You can not change any setting while doing Google hangout or Skype. In medium light situations, the IPhone front face camera during Google hangout, Skype the face is clearly visible; on the other hand, the HTC One X is dark no face at all.

We blinks

My Samsung android phones recognize links associated with apps in the phone. For example;

If a website has YouTube link video. The phone would ask me if I want to open the video in the browser or the YouTube application.

If a website has a link to an address by Google. The phone would ask me to open directions in the browser or the Google Maps app.

The same happens for play store, foursquare,etc.

HTC phones cannot read any links and it is frustrating.

Games

I agree it is not your fault but HTC needs to partner with top game developer companies to have games compatible ready to go from day one. Why? it is frustrating to show my Iphone friends my new phone and tell them I cannot play any of the top games waiting for compatibility. it is frustrating for me because I have paid top dollars for the phone and the games and I can not play them.

Phone Rebooting

I switched the Sense live wallpaper and the phone is back to normal.

Network

AT&T radio I agree it is out of your control.

Network settings phone

AT&T HTC One X needs a toggle 2G and 3G just like the phone versions outside USA. The reason is sometimes the 3G network is not properly performing during events or football games and being able to fall back to 2G has been a great help.

Contact picture resolution:

The contact picture resolution from Google plus or phone the contact phone is too low. My Samsung Captivate with CM9 can do high contact resolution pictures from Google plus or from the contact phone.

Memory lagging.

When going back to send a text ( I swipe)the keyboard takes a few seconds to be ready, it is not bad but it is there. It should be non-existent or at least similar to the Samsung Galaxy S II. Clearing the cache would only temporary solve the problem.

David I hope this information helps to improve the software. Please focus on the multitasking issue because I would be forced to return the phone if I can't perform simple recreational or office activities on the phone.

Thanks