[Galaxy Tab 7.7 Q&A, Help & Troubleshooting] Lt.col.johncross:
Hello,

What we have done here is to explain a little about the diff OS's (or known as Roms in the android world) currently available, and how they work on the sch-i815 Galaxy 7.7 tablet.

ICS 4.0.4 (Ice Cream Sandwich) - Released On March 29, 2012,

One of the biggest overhauls of the Android operating systems since the project unleashed three years ago. An entirely new typeface optimized for high-resolution screens improved readability and brought a polished, modern feel to the user interface. You could say Google finally got Android right with this one and that’s all we are going to say about ICS.

JB 4.2 (Jellybean)

Android 4.2 - This effort affected many aspects of the OS, such as improved vsync timing for faster frame rates on the display itself, triple graphics buffering for preventing dropped frames in video games, and improved overall touch-screen response. In practice, there's definitely a noticeable improvement over, say, Android 4.0 "Ice Cream Sandwich." You can easily resize and move around icons and widgets on each home screen panel or delete apps by swiping the icon up, which causes it to disappear. The system font ("Roboto") already looked sharp and smooth before, and still does. But menu animations, finger swipes, and scrolling feel at least as solid as they do on iOS, if not better.

But Android removed Flash support with Jellybean asking web developers to start using HTML5 – So all the websites that require flash support for video’s and graphics will not work like they did. There are hacks (included in our download) that work to fix this issue as well as web browsers that function differently than others and that will display any page as it should be. As of now many developers have switched to HTML5. Also, the Tablet turns itself on after a few minutes if plugged in to charge while the tablet was off. Just put it to sleep yourself or let it power down on its own.

KK 4.4.4 (KitKat)

Faster Multitasking --

Takes system performance to an all-time high by optimizing memory and improving your touchscreen so that it responds faster and more accurately than ever before. This means that you can listen to music while browsing the web, or race down the highway with the latest hit game, all without a hitch. With KitKat, Google shrank the operating system so that it can run on many more devices, thus helping close the gap between low-end and high-end devices.

I find, it feels significantly faster and extremely more responsive then the others.

BUT -THE WITH KITKAT – The JB hack for flash support no longer works. What does this effect – Well, You Tube video links still embedded in web pages now require you to open the You Tube app to view – MY CHOICE use the Puffin browser to view any pages that have flash requirements. ALWAYS WORKS !!! Also I use Google Chrome for my browser – because it links to my PC and auto syncs my bookmarks between the two.

There is also an unresolved issue where many apps that are designed with specific graphic coding will distort the screens image when the tablet is rotated. A tap tap on the recent apps icon fixes everything but you should not have to tap tap. This issue is under repair and I have a lot of faith in our developer’s that it will be resolved soon.

NOW, what I think is best, is for each individual to be allowed the different experiences of each rom for themselves. Since we installed TWRP on the Tablet you can easily switch back and forth between the different Rom's at will. TWRP also allows you to do complete backups of your tablet and its settings periodically. You will need to get a 32 or 64 GB microsd card for daily use as well as back-ups. Yes - an 8 GB card will work but why???

*****OPEN TWRP to install our Rom's*****

With the tablet in the off position press and hold the power and volume up buttons together. You will first see the Samsung label and then after about 10 - 15 seconds the window turns into a blue screen that says "Teamwin" and then passes you into recovery mode.

*****Installing Ice Cream Sandwich*****

Download the ICS file from here => http://www.androidfilehost.com/?fid=23622183712459012

Place the downloaded file on to your microsd card and place into your tablet.

Open TWRP (as described above) - select "wipe" - "Format Data" - type "yes" and Press return - when completed press the Home icon at the top right of the screen.

Next - select "Install" - Navigate to where you have downloaded the "electron_TWRP_ICS-LP11_i815.zip" file on your microsd card and select it - SWIPE to install.

When complete - select reboot. It can take a couple of minutes, but you will get to the “choose your language” choice eventually and you can go from there. DONE

*****For Jelly Bean and KitKat the process will be different.*****

We will use a restore image instead of a .zip file.

First we set a point to restore to –

Place your microsd card into your tablet.

Open TWRP (as described above)

Select “Backup” and then On the left side of the screen deselect all boxes except “Boot”

On the right side of the screen you should see a button that reads internal storage or microsd. If it reads internal storage then press it and select micro SD card.

Now do the “Swipe to Back Up”.

When done tap the “Home” icon at the top right and then select “Reboot” and then “Power Off”.

Remove the microsd card and place it into your PC.

Download the JellyBean image from here => https://www.androidfilehost.com/?fid=23622183712460084

After download completes you will need to unzip the file. This should give you a folder named Jellybean.

Using you PC's file manager navigate to the folder “TWRP” and open it. Now open “Backups” and then open the “long numbered folder” on the microsd card– place the Jellybean folder here. You now have two folders in the long numbered folder. Eject the microsd card from your PC and put it back in to the tablet.

Open TWRP (as described above)

Select “Restore” – you should now see the “Jellybean” restore file. Select it.

Use the “SWIPE to Restore”

When it is done select reboot and you are done.

Notes

All three OS's have different launchers, or you might know it as the standard desktop, this arranges the graphics, placement of things like clock, notifications, etc. - but we strongly suggest that you install the NOVA launcher, from play store, and use it vs the Samsung Touchwiz or Google Now or trebuchet Launchers that come with theses OS's. NOVA is Highly customizable, performance driven, by far the best home screen replacement for Android 4.0+, and it can be backed up to the external microsd card. So, when you switch from OS to OS you can easily restore the NOVA launcher settings and arrangements you prefer.

Also, the reason we are supplying you with restore files for the JB and KitKat roms is to get the rom to a place we feel is best – including the nova launcher – Adblock and adfree. Many custom add-ins for the experience we think you will like best.

If you care to go further and start from a more raw point then follow development for our tabs here

http://xdaforums.com/galaxy-tab-7-7/development

Enjoy – it’s a lot to learn!!