Check properly. You must extract the *.img file from the zip file you downloaded, not the zip file itself.

The reason to downgrade to lower version is to enable rooting in order to install custom ROM. There's no point if you downgrade from the better v10e to v10a just to use the v10a. Unless you want to continue experiencing lag, then install a custom ROM, or upgrade it back to the stable v10e.

Did you transfer the flash_image file as well?

Speed improvement. You can now play Angry Birds 100% without lag, smooth all the way and same goes to other popular games. No more unnecessary LG Apps Advisor and many more useless apps hogging the memory compared to LG ROM. You are probably hesitating to install void or not, but trust me you won't go back to LG ROM, except when you need to claim warranty

From many problems I see here, I could tell that you guys did not get the LG USB drivers installed properly, or did not install it at all. Sure, your phone is detected by your PC, but only as a storage device without the driver, no different from your thumb drive.

You need to downgrade to Android 2.2 (v10c and earlier) to root your phone, if it's already 2.2 then you don't need to downgrade to root. You need to get your phone rooted to flash custom ROM.

I suppose not, you need to flash LG original ROM back again, but I'm sure they are working on Gingerbread-based Void ROM now.

Err yes you should.... It should take no more than 5 minutes at most

It would be better to repeat the Terminal Emulator process and continue from there

I can see one of your problem. The 2GB SDcard given with the phone is problematic. Sometimes it becomes undetected for no apparent reason. It's really recommended that you get a replacement SD card of Class 4. Anything below Class 4 might be posing you some troubles.

Don't really have a problem, but it takes longer time to get a lock.

I got no such problem. Does anyone else have this problem?

Yes it does. Froyo comes with tethering feature by default.

Go here and search for sapps-addon, download it and put in void settings folder on the SD card. Reboot.

New to Android? Then read here, http://forum.lowyat.net/topic/1211308.

Since you have been using iOS, I'm sure you are familiar of jailbreaking (which is illegal). Android has the similar term, which is called rooting (which is legal). As someone who has used both of these OS, Android rooting is like 10x what iOS jailbreaking is capable of. iOS gives you simplicity, but Android is really hard to use initially, but once you have got the hang on it, it's really powerful and flexible.

1. It's a quick start guide, not a manual. Even HTC Desire only provides this. You can download the 30mb pdf manual from the web, just google "Optimus T manual)

2&3. You can uninstall them by rooting the phone. If you don't want clutter, you can install custom ROM which is one of the wonders of Android but get help from someone who can do it for you since this is not really for you at this rate, so rooting and uninstalling them would be the best.

4. LG firmware does not provide swype as of this moment IIANM.

Well, don't hate your phone yet, because there are tonnes of fun stuffs waiting for you, such as installing custom ROM which will definitely amaze you

Didn't you guys make a nandroid backup? That's the purpose. If it doesn work or you somehow messed with the backup, just use the KDZ updater to flash the original LG firmware again.

Refer to the instructions I posted earlier. When you are to flash a custom ROM, you will need to go through the nandroid backup process.

Ok I guess you have to repeat the whole thing from the beginning. Flash back the original LG firmware, unroot your phone, then start from step 1

Eh? I don't have this problem. How about creating it again?

No problem, I just compiled it so forumers here don't need to refer to many different websites and got confused which one to do first.

Not actually perfect, but performance is much better than what you got out of the box.

Because it's a free market, everyone is welcome to enter, stay or leave I don't bother downloading one since I do regular backup, and do not download from dubious sources.

Depends on your use. 8GB (7.4GB working capacity) is enough for me, but if you feel like it's not enough then go for 16GB.

It's microSD.

Any brand as long as microSD I'm using Apacer, simply because Kingston didn't provide me with the adapter, Patriot was too expensive even though it is class 4 too, Sandisk was expensive too. In the end, I chose Apacer because it was the cheapest and came with the adapter