[G Tablet General] roebeet:
THIS MOD HAS BEEN RETIRED. This was a pre-release version based off of the vendor's UAT 3991 build. It was pulled shortly after it was released due to a large number of soft-bricks, and has never been reactivated. I am leaving this post up as a reference, only - and also leaving the supplement link up for current users who still need that. ​

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TwoTapsX is a an EXPERIMENTAL ROM for use with the GTablet. It is based off the vendor's "1.2" dev branch which replaces the bootloader on the device. What this means is that 1) you need standard recovery (not clockworkmod) to upgrade to the ROM and 2) you need standard recovery to backout to an older mod or old stock. Please read the instructions CAREFULLY and FULLY. Failure to do so can cause you to soft-brick you device. Viewsonic does not support this mod and will not help you!!!

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REQUIRED Pre-requisites

If you are coming from a 1.0.1 or 1.1 stock ROM or mod, you need to be running the 3588 stock ROM, ESPECIALLY 3588 recovery. In other words, you need to be a complete stock device as that causes the lowest risk of soft-brickage.

Recommended Pre-requisites

1. Setup and learn how to use nvflash. This is your backout in case something bad happens, so I would highly recommend you understand how to use this, in advance. Link details: http://xdaforums.com/showthread.php?t=861950. nvflash is specific to Tegra 2 devices only.

2. Setup and learn how to use adb. This is a standard Android tool that will give you a remote shell into the device. This is helpful to push and pull files, and do general troubleshooting. For example, you can do a data wipe within adb if your device boot loops by typing "adb remount" and then "Adb shell wipe data" and then reboot. A VERY helpful tool for anyone modding their device.

Information on adb and how to install it / use it can found in several areas in XDA, or on other Android sites. It's part of the Google Android SDK.

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Installation:

The base mod has been PULLED, due to installation issues

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Backout from TNT Lite 5 / TwoTapsX to TnT Lite 4.3.0 or 3588 stock:

Pre-requisite: You MUST have standard 3991 recovery. If you installed the 3991-friendly clockworkmod (see references below), then you need to remove it. The easiest way to do that, at the moment, is to reflash to 3991 standard recovery, using the reference update.zip (see the References area). If you did not install cwm, then you have 3991 recovery already.

Once standard 3991 recovery is confirmed installed, you can use any of the following ROM's to backout to a "legacy" 1.1-based firmware: 3588 stock, TNT Lite 4.3.0 or gADAM 1.3.0. You would just use the standard instructions for these (ie. add the update.zip and recovery folders to the root of your drive, and reboot into recovery).

I have tested all of these scenarios and the backout does work. However, as always, there is a risk here so I would HIGHLY recommend that you setup and master nvflash BEFORE you attempt backing out. That's just in case the backout fails and you need an emergency procedure to unbrick your device.

TO STRESS -- DO NOT, under any circumstances, backout directly to anything other than 3588 stock, TNT Lite 4.3.0 or gADAM 1.3.0, nor use clockworkmod as you WILL most likely semi-brick your device!!!

NOTE FOR TNT LITE 4.3.x -- recovery will be broken, after the downgrade. In this case, just run the Recovery Pack and you can fix it (see the TNT Lite first post, for details)

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Downloads:

TwoTapsX .902 pre-release SUPPLEMENT only: http://www.mediafire.com/?k5x5if1qoeeh8u0

md5sum: be43c8a02474a0984d5f292ad55e35d4

Note: This is JUST the supplement, for TNT Lite 5 / TTx users only! I have NOT reactivated the base ROM. It has been pulled.

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Your device is bricked, what to do:

See this post for details on nvflash : http://xdaforums.com/showthread.php?t=861950

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Reference Links

- Clockworkmod bekit v.8 only (1.2-3991 friendly) update.zip (for technical users only -- ONLY use with TnT Lite 5.x, 3991 stock or TwoTapsX!!!!): http://www.mediafire.com/?ykn3jwq7kvegc4g

This is a replacement for standard recovery. It adds the ability to backup and restore system images, for example. WARNING: YOU CANNOT BACKOUT to 1.1-based legacy mods with clockworkmod, you WILL semi-brick the device if you try. If you already installed this, then reflash to 3991 standard recovery, as mentioned below.

- 3991 standard recovery update.zip -- ONLY use with TnT Lite 5.x, 3991 stock or TwoTapsX!!!!): http://www.mediafire.com/?ripr3c96h55alg0

This will add the 3991 standard recovery back on a TNT Lite 5 / TwoTapsX system. You'd need this if you wanted a functional recovery to backout to 3588 stock, TNT Lite 4.3.0 or gADAM 1.3.0.